# DevTools Surf

> 919+ online developer tools covering REST API workflows, formatting, validation, conversion, generation, image and audio processing, PDF utilities, and more. Hosted at https://devtools.surf.

DevTools Surf is a developer-tools suite. The flagship is REST Handler, a browser-based REST client with collections, environment variables, and request history. Alongside it are 918+ utility tools grouped by category: JSON, HTML, XML, YAML, CSS, JavaScript, converters between formats, image and audio processing, PDF utilities, text transforms, encoders, generators, color pickers, networking helpers, security and crypto, datetime, calculators, plus curated cheatsheets and info pages.

Each H2 below corresponds to one tool category and links to every tool page in that category. The final ## Optional section lists supporting resources an LLM can skip when context is tight. For a richer per-tool index with use cases, tips, tags, input and output types, and runtime hints, see https://devtools.surf/llms-full.txt.

## Flagship

- [REST Handler](https://devtools.surf/tools/rest-handler/) - Simple REST client with collections, environment variables, request history, and a cURL to Collection JSON converter.

## JSON

- [JSON Formatter](https://devtools.surf/tools/json-formatter/) - Format and prettify JSON with syntax highlighting
- [JSON Validator](https://devtools.surf/tools/json-validator/) - Validate JSON syntax and structure
- [JSON Viewer](https://devtools.surf/tools/json-viewer/) - Explore JSON data in a tree view
- [JSON Stringify](https://devtools.surf/tools/json-stringify/) - Convert JSON to escaped string representation
- [JSON Patch](https://devtools.surf/tools/json-patch/) - Generate or apply RFC 6902 JSON Patch operations
- [JSON Diff](https://devtools.surf/tools/json-diff/) - Compare two JSON documents and show structural differences
- [JSONPath Tester](https://devtools.surf/tools/jsonpath-tester/) - Test JSONPath expressions against a JSON document
- [JSON Sort Keys](https://devtools.surf/tools/json-sort-keys/) - Recursively sort all keys in a JSON document alphabetically
- [JSON Flatten / Unflatten](https://devtools.surf/tools/json-flatten/) - Flatten nested JSON to dot-notation or unflatten back
- [JSON Minifier](https://devtools.surf/tools/json-minifier/) - Minify JSON with size statistics
- [JSON Merge / Deep Merge](https://devtools.surf/tools/json-merge/) - Merge JSON documents with deep, shallow or replace strategies and a conflict report
- [JSON to JSON5](https://devtools.surf/tools/json5-converter/) - Convert between strict JSON and relaxed JSON5 format
- [NDJSON / JSONL Viewer](https://devtools.surf/tools/ndjson-viewer/) - Parse and display newline-delimited JSON line by line
- [JSON Path Finder](https://devtools.surf/tools/json-path-finder/) - Enter JSON and a value to get every JSONPath that matches
- [Smart JSON Diff](https://devtools.surf/tools/diff-two-json/) - Structural diff between two JSON docs with summary stats
- [JSON Escape String](https://devtools.surf/tools/json-escape-string/) - Escape any text as a JSON-safe string with \n \t \uXXXX handling
- [JSON Unescape String](https://devtools.surf/tools/json-unescape-string/) - Reverse JSON escape sequences back to raw text
- [JMESPath Tester](https://devtools.surf/tools/jmespath-tester/) - Query JSON with JMESPath expressions + live result + examples

## HTML

- [HTML Formatter](https://devtools.surf/tools/html-formatter/) - Format and indent HTML code
- [HTML Pretty Print](https://devtools.surf/tools/html-pretty-print/) - Pretty print HTML with color-coded output
- [HTML Validator](https://devtools.surf/tools/html-validator/) - Validate HTML markup and structure
- [HTML Viewer](https://devtools.surf/tools/html-viewer/) - Preview and inspect HTML in real-time
- [HTML Minify](https://devtools.surf/tools/html-minify/) - Minify HTML by removing whitespace and comments
- [HTML Minifier](https://devtools.surf/tools/html-minifier/) - Minify HTML with compression options
- [HTML to Plain Text](https://devtools.surf/tools/html-to-text/) - Strip tags, decode entities, preserve paragraph breaks

## XML

- [XML Formatter](https://devtools.surf/tools/xml-formatter/) - Format and prettify XML documents
- [XML Minify](https://devtools.surf/tools/xml-minify/) - Minify XML by removing whitespace
- [XML Viewer](https://devtools.surf/tools/xml-viewer/) - View XML in a structured tree format
- [XML Pretty Print](https://devtools.surf/tools/xml-pretty-print/) - Pretty print XML with syntax highlighting
- [XML Validator](https://devtools.surf/tools/xml-validator/) - Validate XML syntax and well-formedness
- [XML Editor](https://devtools.surf/tools/xml-editor/) - Edit XML with real-time validation and highlighting
- [XML Parser](https://devtools.surf/tools/xml-parser/) - Parse XML and extract structured data
- [WSDL Formatter](https://devtools.surf/tools/wsdl-formatter/) - Format WSDL Web Services Description Language files
- [SOAP Formatter](https://devtools.surf/tools/soap-formatter/) - Format SOAP XML messages
- [XML Schema XSD Validator](https://devtools.surf/tools/xml-schema-validator/) - Validate XML against basic XSD schema rules

## YAML

- [YAML Validator](https://devtools.surf/tools/yaml-validator/) - Validate YAML syntax and structure
- [YAML Viewer](https://devtools.surf/tools/yaml-viewer/) - View YAML in a structured tree format
- [YAML Formatter](https://devtools.surf/tools/yaml-formatter/) - Format and prettify YAML documents
- [YAML Parser](https://devtools.surf/tools/yaml-parser/) - Parse YAML and extract structured data
- [YAML Multi-Doc Splitter](https://devtools.surf/tools/yaml-multi-doc-splitter/) - Split a multi-document YAML file into separate documents
- [YAML Anchor Expander](https://devtools.surf/tools/yaml-anchor-expander/) - Expand YAML anchors and aliases into plain YAML

## CSS

- [Minify CSS](https://devtools.surf/tools/css-minify/) - Minify CSS by removing whitespace and comments
- [CSS Beautifier](https://devtools.surf/tools/css-beautifier/) - Beautify and format CSS code
- [CSS Formatter](https://devtools.surf/tools/css-formatter/) - Format CSS with proper indentation
- [CSS Pretty Print](https://devtools.surf/tools/css-pretty-print/) - Pretty print CSS with color coding
- [CSS to LESS](https://devtools.surf/tools/css-to-less/) - Convert CSS to LESS preprocessor syntax
- [CSS to SCSS](https://devtools.surf/tools/css-to-scss/) - Convert CSS to SCSS preprocessor syntax
- [CSS to SASS](https://devtools.surf/tools/css-to-sass/) - Convert CSS to SASS syntax
- [CSS to Stylus](https://devtools.surf/tools/css-to-stylus/) - Convert CSS to Stylus syntax
- [Stylus to CSS](https://devtools.surf/tools/stylus-to-css/) - Convert Stylus to standard CSS
- [Stylus to LESS](https://devtools.surf/tools/stylus-to-less/) - Convert Stylus to LESS syntax
- [Stylus to SCSS](https://devtools.surf/tools/stylus-to-scss/) - Convert Stylus to SCSS syntax
- [Stylus to SASS](https://devtools.surf/tools/stylus-to-sass/) - Convert Stylus to SASS syntax
- [LESS to CSS](https://devtools.surf/tools/less-to-css/) - Convert LESS to standard CSS
- [LESS to SCSS](https://devtools.surf/tools/less-to-scss/) - Convert LESS to SCSS syntax
- [LESS to SASS](https://devtools.surf/tools/less-to-sass/) - Convert LESS to SASS syntax
- [LESS to Stylus](https://devtools.surf/tools/less-to-stylus/) - Convert LESS to Stylus syntax
- [SCSS to CSS](https://devtools.surf/tools/scss-to-css/) - Convert SCSS to standard CSS
- [SCSS to LESS](https://devtools.surf/tools/scss-to-less/) - Convert SCSS to LESS syntax
- [SCSS to SASS](https://devtools.surf/tools/scss-to-sass/) - Convert SCSS to SASS syntax
- [SCSS to Stylus](https://devtools.surf/tools/scss-to-stylus/) - Convert SCSS to Stylus syntax
- [SASS to CSS](https://devtools.surf/tools/sass-to-css/) - Convert SASS to standard CSS
- [SASS to LESS](https://devtools.surf/tools/sass-to-less/) - Convert SASS to LESS syntax
- [SASS to SCSS](https://devtools.surf/tools/sass-to-scss/) - Convert SASS to SCSS syntax
- [SASS to Stylus](https://devtools.surf/tools/sass-to-stylus/) - Convert SASS to Stylus syntax
- [CSS Grid Generator](https://devtools.surf/tools/css-grid-generator/) - Generate grid-template CSS with custom cols, rows, and gap
- [CSS Border Builder](https://devtools.surf/tools/css-border-builder/) - Build border CSS - width, style, color, radius, per-side control
- [CSS Text Shadow](https://devtools.surf/tools/css-text-shadow/) - Build text-shadow with x, y, blur, color - includes neon/retro presets
- [CSS Filter Builder](https://devtools.surf/tools/css-filter-builder/) - Chain blur, brightness, contrast, hue-rotate, saturate, sepia
- [CSS Transform Builder](https://devtools.surf/tools/css-transform-builder/) - Build transform - translate, rotate, scale, skew, 3D rotations
- [CSS Glassmorphism](https://devtools.surf/tools/css-glassmorphism/) - Generate frosted-glass UI - backdrop-filter blur + transparent bg
- [CSS Neumorphism](https://devtools.surf/tools/css-neumorphism/) - Generate soft-UI box-shadow combinations - raised, inset, and flat modes
- [CSS Button Styles](https://devtools.surf/tools/css-button-styles/) - Generate modern button CSS - lift hover, shadow, colors, radius, padding
- [CSS Tooltip Builder](https://devtools.surf/tools/css-tooltip-builder/) - Build a pure-CSS tooltip from data-attr - top/bottom/left/right positions
- [CSS Card Builder](https://devtools.surf/tools/css-card-builder/) - Elevated card with hover-lift + shadow - fully customizable
- [CSS Form Styler](https://devtools.surf/tools/css-form-styler/) - Style inputs, textareas, selects - focus ring, accent color, radius
- [CSS Accordion Builder](https://devtools.surf/tools/css-accordion-builder/) - Build a zero-JS accordion using <details>/<summary> + CSS animation
- [CSS Tabs Builder](https://devtools.surf/tools/css-tabs-builder/) - Build an accessible tab bar with aria-selected styling + bottom accent
- [CSS Modal Builder](https://devtools.surf/tools/css-modal-builder/) - Native <dialog> modal with backdrop blur + entrance animation
- [CSS Checkbox Styler](https://devtools.surf/tools/css-checkbox-styler/) - Build a custom checkbox with CSS-only checkmark - accent & size control
- [CSS Switch / Toggle](https://devtools.surf/tools/css-switch-toggle/) - Build an iOS-style toggle switch - slider moves on :checked
- [CSS Progress Bar](https://devtools.surf/tools/css-progress-bar/) - Gradient progress bar with animated shimmer - accessible
- [CSS Ribbon Builder](https://devtools.surf/tools/css-ribbon-builder/) - Build a corner ribbon label using clip-path - content via data-ribbon attr
- [CSS Avatar Builder](https://devtools.surf/tools/css-avatar-builder/) - Circular/square avatar with initials, ring, image fallback
- [CSS Flip Card](https://devtools.surf/tools/css-flip-card/) - 3D hover-flip card using perspective + backface-visibility
- [CSS Dropdown Builder](https://devtools.surf/tools/css-dropdown-builder/) - Hover + focus-within dropdown - zero JS, animated
- [CSS Breadcrumb Builder](https://devtools.surf/tools/css-breadcrumb-builder/) - Navigation breadcrumb with custom separator - /, >, arrow
- [CSS Arrow Generator](https://devtools.surf/tools/css-arrow-generator/) - Generate a pure-CSS arrow up/down/left/right using rotated borders
- [CSS Triangle Generator](https://devtools.surf/tools/css-triangle-generator/) - Build a zero-element triangle using transparent borders - any direction
- [CSS Divider Builder](https://devtools.surf/tools/css-divider-builder/) - Build a horizontal rule - solid/dashed/dotted or labeled OR, AND, etc

## JavaScript

- [JS Beautifier](https://devtools.surf/tools/js-beautifier/) - Beautify and format JavaScript code
- [Javascript Pretty Print](https://devtools.surf/tools/js-pretty-print/) - Pretty print JavaScript with syntax highlighting
- [JS Minifier](https://devtools.surf/tools/js-minifier/) - Compress JavaScript by stripping whitespace, comments, and redundant syntax
- [JavaScript Cheat Sheet](https://devtools.surf/tools/js-cheatsheet/) - Searchable reference: variables, async, classes, DOM, fetch, gotchas, ES2020-2024
- [Console Log Generator](https://devtools.surf/tools/js-console-log-generator/) - Turn a variable name into ready-to-paste console.log/table/group/dir statements
- [Object Path Resolver](https://devtools.surf/tools/js-object-path-resolver/) - Resolve a dotted/bracket path against a JSON object - like lodash.get
- [npm Package Name Validator](https://devtools.surf/tools/npm-package-name-validator/) - Check whether a name passes npm's publish rules length, casing, reserved prefixes

## Converters

- [JSON to XML](https://devtools.surf/tools/json-to-xml/) - Convert JSON data to XML format
- [JSON to CSV](https://devtools.surf/tools/json-to-csv/) - Convert JSON array to CSV format
- [JSON to YAML](https://devtools.surf/tools/json-to-yaml/) - Convert JSON to YAML format
- [JSON to TSV](https://devtools.surf/tools/json-to-tsv/) - Convert JSON array to Tab-Separated Values
- [JSON to String](https://devtools.surf/tools/json-to-string/) - Convert JSON to escaped string format
- [XML to JSON](https://devtools.surf/tools/xml-to-json/) - Convert XML to JSON format
- [XML to CSV](https://devtools.surf/tools/xml-to-csv/) - Convert XML data to CSV format
- [XML to String](https://devtools.surf/tools/xml-to-string/) - Convert XML to escaped string
- [XML to YAML](https://devtools.surf/tools/xml-to-yaml/) - Convert XML to YAML format
- [RSS to JSON](https://devtools.surf/tools/rss-to-json/) - Convert RSS/Atom feed to JSON format
- [YAML to JSON](https://devtools.surf/tools/yaml-to-json/) - Convert YAML to JSON format
- [YAML to XML](https://devtools.surf/tools/yaml-to-xml/) - Convert YAML to XML format
- [YAML to CSV](https://devtools.surf/tools/yaml-to-csv/) - Convert YAML array to CSV format
- [CSV to JSON](https://devtools.surf/tools/csv-to-json/) - Convert CSV data to JSON format
- [CSV to XML](https://devtools.surf/tools/csv-to-xml/) - Convert CSV data to XML format
- [CSV to YAML](https://devtools.surf/tools/csv-to-yaml/) - Convert CSV data to YAML format
- [CSV to HTML](https://devtools.surf/tools/csv-to-html/) - Convert CSV data to HTML table
- [String to JSON](https://devtools.surf/tools/string-to-json/) - Parse stringified JSON back to formatted JSON
- [String to XML](https://devtools.surf/tools/string-to-xml/) - Parse stringified XML back to formatted XML
- [BSON to JSON](https://devtools.surf/tools/bson-to-json/) - Convert between BSON hex and JSON
- [INI to JSON](https://devtools.surf/tools/ini-to-json/) - Convert between INI config files and JSON
- [HCL Terraform to JSON](https://devtools.surf/tools/hcl-to-json/) - Convert between HCL/Terraform config and JSON
- [EDN to JSON](https://devtools.surf/tools/edn-to-json/) - Convert between Clojure EDN and JSON formats
- [JSON to Go Struct](https://devtools.surf/tools/json-to-go-struct/) - Convert JSON to Go struct definitions with json tags
- [YAML to .env](https://devtools.surf/tools/yaml-to-env/) - Flatten a YAML file to KEY=value lines
- [.env to YAML](https://devtools.surf/tools/env-to-yaml/) - Group dotted KEY_NAME pairs back into a YAML tree
- [JSON to Zod Schema](https://devtools.surf/tools/json-to-zod/) - Derive a runtime-validatable Zod schema from a JSON sample
- [JSON to .env](https://devtools.surf/tools/json-to-env/) - Flatten a JSON object into UPPER_SNAKE KEY=value lines
- [.env to JSON](https://devtools.surf/tools/env-to-json/) - Parse KEY=value lines with quotes + comments into a JSON object
- [JSON to TypeScript Types](https://devtools.surf/tools/json-to-typescript-types/) - Infer TypeScript interfaces from JSON with deep nesting + optionals
- [JSON to Python Dict](https://devtools.surf/tools/json-to-python-dict/) - Convert JSON to a valid Python dict literal True/False/None
- [JSON to PHP Array](https://devtools.surf/tools/json-to-php-array/) - Convert JSON to a PHP 5.4+ short-syntax associative array
- [JSON to Ruby Hash](https://devtools.surf/tools/json-to-ruby-hash/) - Convert JSON to a Ruby hash with symbol or string keys
- [JSON to Java Class](https://devtools.surf/tools/json-to-java-class/) - Generate a POJO Java class with getters/setters from a JSON sample
- [JSON to Swift Struct](https://devtools.surf/tools/json-to-swift-struct/) - Generate a Codable Swift struct from a JSON sample
- [JSON to Kotlin Class](https://devtools.surf/tools/json-to-kotlin-class/) - Generate a Kotlin data class from a JSON sample
- [JSON to Rust Struct](https://devtools.surf/tools/json-to-rust-struct/) - Generate a serde-compatible Rust struct from a JSON sample
- [JSON to C# Class](https://devtools.surf/tools/json-to-csharp-class/) - Generate a C# class with properties + nullables from JSON
- [JSON to Dart Class](https://devtools.surf/tools/json-to-dart-class/) - Generate a Dart class with fromJson/toJson from a JSON sample
- [JSON Schema to TypeScript](https://devtools.surf/tools/json-schema-to-typescript/) - Convert a JSON Schema draft-07 document into TypeScript types
- [JSON to MongoDB Query](https://devtools.surf/tools/json-to-mongodb-query/) - Convert flat key-value JSON into a MongoDB find query object
- [JSON to Query String](https://devtools.surf/tools/json-to-query-string/) - Serialize a flat JSON object into a URL query string
- [Excel to CSV](https://devtools.surf/tools/excel-csv-converter/) - Convert between Excel format and CSV with format preservation
- [Markdown to HTML](https://devtools.surf/tools/markdown-to-html/) - Convert Markdown text to HTML with full formatting support
- [LaTeX to HTML](https://devtools.surf/tools/latex-to-html/) - Convert LaTeX markup to HTML with basic formatting
- [AsciiDoc to HTML](https://devtools.surf/tools/asciidoc-to-html/) - Convert AsciiDoc markup to HTML with structure preservation
- [reStructuredText to HTML](https://devtools.surf/tools/rst-to-html/) - Convert reStructuredText markup to HTML format
- [Org-Mode to HTML](https://devtools.surf/tools/org-mode-to-html/) - Convert Emacs Org-Mode markup to HTML

## Images

- [Sample Images](https://devtools.surf/tools/sample-images/) - Download standard-size placeholder images or generate a custom size
- [Image Converter](https://devtools.surf/tools/image-converter/) - Convert images between PNG, JPEG, WebP and more
- [Bulk Image Converter](https://devtools.surf/tools/bulk-image-converter/) - Convert multiple images at once to a chosen format
- [Image Editor](https://devtools.surf/tools/image-editor/) - Crop, annotate, draw, and add text to images
- [Aspect Ratio Calculator](https://devtools.surf/tools/aspect-ratio-calculator/) - Calculate aspect ratios and resize dimensions proportionally
- [SVG Optimizer](https://devtools.surf/tools/svg-optimizer/) - Minify and clean SVG markup by removing metadata and comments
- [Favicon Generator](https://devtools.surf/tools/favicon-generator/) - Generate a favicon pack from a single image or emoji
- [Lorem Picsum Picker](https://devtools.surf/tools/picsum-picker/) - Browse and download curated placeholder images
- [Avatar / Initials Generator](https://devtools.surf/tools/avatar-generator/) - Create initials-based SVG avatars from a name
- [Image Metadata Viewer](https://devtools.surf/tools/image-metadata-viewer/) - Show EXIF / IPTC / XMP metadata from JPEG, PNG, HEIF
- [Base64 to Image](https://devtools.surf/tools/base64-image/) - Encode an image to a data URL, or decode a data URL back to an image
- [Image Palette Extractor](https://devtools.surf/tools/image-palette-extractor/) - Extract the dominant colors from an image
- [Image Resizer Batch](https://devtools.surf/tools/image-resizer-batch/) - Resize and crop multiple images in the browser
- [WebP to AVIF Converter](https://devtools.surf/tools/webp-avif-converter/) - Convert images between WebP, AVIF, PNG, and JPEG in-browser
- [Video Thumbnail Extractor](https://devtools.surf/tools/video-thumbnail/) - Scrub a video and export a frame as a PNG or JPEG
- [Unity Icon Generator](https://devtools.surf/tools/unity-icon-generator/) - One 1024 PNG to every Unity Player-Settings icon size iOS / Android / Standalone / WebGL
- [Android Icon Generator](https://devtools.surf/tools/android-icon-generator/) - Adaptive foreground+background, every mipmap-dpi bucket, Play Store 512, ic_launcher.xml
- [iOS Icon Generator](https://devtools.surf/tools/ios-icon-generator/) - Every iPhone / iPad / App-Store icon size with @1x/@2x/@3x labels + Contents.json
- [SVG to PNG](https://devtools.surf/tools/svg-to-png/) - Convert SVG to PNG with scaling
- [Image Compressor](https://devtools.surf/tools/image-compressor/) - Compress JPEGs with quality + scale sliders and live size preview
- [Image Grayscale](https://devtools.surf/tools/image-grayscale/) - Desaturate any image - 0-100% grayscale, preview + download
- [Image Rotator](https://devtools.surf/tools/image-rotator/) - Rotate an image by any angle - canvas re-fits to new bounds
- [Image Cropper](https://devtools.surf/tools/image-cropper/) - Crop an image from left/top/right/bottom with % sliders
- [Image Color Inverter](https://devtools.surf/tools/image-invert/) - Invert every pixel's RGB - negative / X-ray effect
- [Image Watermark](https://devtools.surf/tools/image-watermark/) - Tile a text watermark across any image - opacity + angle control
- [ASCII Art Generator](https://devtools.surf/tools/ascii-art-generator/) - Convert photos to ASCII art - dense / simple / block ramps
- [Image Blur](https://devtools.surf/tools/image-blur/) - Apply canvas blur 0-40px - great for hero backgrounds
- [Image Brightness / Contrast](https://devtools.surf/tools/image-brightness-contrast/) - Adjust brightness, contrast, and saturation in one pass
- [Image Flip / Mirror](https://devtools.surf/tools/image-flip-mirror/) - Flip an image horizontally, vertically, or both
- [Image to Base64](https://devtools.surf/tools/image-to-base64/) - Convert images to base64 data URLs with format options
- [Base64 to Image](https://devtools.surf/tools/base64-to-image/) - Decode base64 strings to viewable images
- [Image Compression](https://devtools.surf/tools/image-compression/) - Compress images with quality settings and estimate savings
- [Image Resize](https://devtools.surf/tools/image-resize/) - Resize images with aspect ratio preservation and preview
- [Image Crop](https://devtools.surf/tools/image-crop/) - Crop images with coordinates and preview functionality
- [Image Filter](https://devtools.surf/tools/image-filter/) - Apply CSS filters grayscale, sepia, blur, brightness, etc
- [Color Palette Extractor](https://devtools.surf/tools/color-palette-extractor/) - Extract dominant colors from images for palette generation
- [QR Code Decoder](https://devtools.surf/tools/qr-code-scanner-simulator/) - Decode a pasted QR module grid for real - version, ECC level, mask, Reed-Solomon check and payload - or explain a QR payload string
- [Barcode / GTIN Decoder](https://devtools.surf/tools/barcode-scanner-simulator/) - Verify EAN, UPC, ITF-14 and SSCC check digits, expand UPC-E, decode GS1 element strings and look up the GS1 prefix
- [OCR Simulator](https://devtools.surf/tools/ocr-simulator/) - Read an image's real header, get the right tesseract command for it, and clean up the OCR text you paste back - no text is extracted here

## Text / String

- [URL Encoder](https://devtools.surf/tools/url-encoder/) - Encode strings for safe URL usage
- [URL Decoder](https://devtools.surf/tools/url-decoder/) - Decode percent-encoded URL strings
- [HTML Entity Encode](https://devtools.surf/tools/html-entity-encode/) - Convert characters to HTML entities
- [HTML Entity Decode](https://devtools.surf/tools/html-entity-decode/) - Convert HTML entities back to characters
- [JWT Decoder](https://devtools.surf/tools/jwt-decoder/) - Decode and inspect JWT token header and payload
- [Lorem Ipsum Generator](https://devtools.surf/tools/lorem-ipsum-generator/) - Generate placeholder text in words, sentences, or paragraphs
- [Word Counter](https://devtools.surf/tools/word-counter/) - Count words, characters, sentences, paragraphs, and reading time
- [Text Diff](https://devtools.surf/tools/text-diff/) - Compare two text blocks and highlight differences
- [Case Converter](https://devtools.surf/tools/case-converter/) - Convert between camelCase, snake_case, PascalCase, kebab-case, and more
- [Line Sorter](https://devtools.surf/tools/line-sorter/) - Sort lines alphabetically, numerically, reverse, shuffle, or dedupe
- [Regex Tester](https://devtools.surf/tools/regex-tester/) - Test regex patterns with match highlighting and group extraction
- [String Escape / Unescape](https://devtools.surf/tools/string-escape/) - Escape and unescape strings for JS, JSON, HTML, or SQL
- [Markdown Preview](https://devtools.surf/tools/markdown-preview/) - Live preview rendered Markdown with syntax highlighting
- [.env Validator](https://devtools.surf/tools/env-validator/) - Validate .env files and flag missing values or duplicate keys
- [Byte Counter](https://devtools.surf/tools/byte-counter/) - Show byte size of text in UTF-8, UTF-16, and ASCII
- [TOML Formatter](https://devtools.surf/tools/toml-formatter/) - Format and validate TOML configuration files
- [Markdown Table Editor](https://devtools.surf/tools/markdown-table-editor/) - Edit Markdown tables with a visual grid - add rows and align cells
- [JWT to cURL](https://devtools.surf/tools/jwt-to-curl/) - Generate a curl command that uses a JWT as the Authorization header
- [Diff Viewer Side-by-Side](https://devtools.surf/tools/diff-viewer/) - View unified or side-by-side diffs with syntax highlighting
- [Environment Variable Diff](https://devtools.surf/tools/env-diff/) - Compare two .env files and show added, removed, and changed variables
- [Unicode Normalizer](https://devtools.surf/tools/unicode-normalizer/) - Normalize Unicode text between NFC, NFD, NFKC, and NFKD forms
- [Markdown Resume Builder](https://devtools.surf/tools/markdown-resume-builder/) - Write a resume in Markdown and export to styled HTML, print-ready for PDF
- [Regex Cheatsheet](https://devtools.surf/tools/regex-cheatsheet/) - Searchable reference of regex syntax with live examples
- [Unicode Escape](https://devtools.surf/tools/unicode-escape/) - Escape non-ASCII chars as \uXXXX or decode them back
- [Pronouncing Counter](https://devtools.surf/tools/pronouncing-counter/) - Count syllables per word useful for copy + slugs
- [Readability Scorer](https://devtools.surf/tools/readability-scorer/) - Flesch + grade-level estimate for any prose block
- [Word Frequency Counter](https://devtools.surf/tools/word-frequency/) - Rank words by frequency, stop-words filtered
- [Clipboard Cleaner](https://devtools.surf/tools/clipboard-cleaner/) - Strip smart quotes, zero-widths, non-breaking spaces
- [Markdown TOC](https://devtools.surf/tools/markdown-toc/) - Generate a table of contents from markdown headings
- [Whitespace Visualizer](https://devtools.surf/tools/whitespace-visualizer/) - Render spaces, tabs, newlines, zero-widths as glyphs
- [Line Deduper](https://devtools.surf/tools/line-deduper/) - Remove duplicate lines, preserve order or sort
- [Hard Wrap](https://devtools.surf/tools/text-wrap/) - Re-wrap prose to a fixed column width
- [IETF Language Tag Validator](https://devtools.surf/tools/ietf-tag-validator/) - Validate BCP 47 tag zh-Hant-TW - canonical form + regions
- [Line Deduper](https://devtools.surf/tools/line-dedupe/) - Collapse duplicate lines, show occurrence counts
- [Safe Filename Generator](https://devtools.surf/tools/safe-filename-generator/) - Strip accents + unsafe chars to filesystem-safe filename
- [ASCII Box Drawer](https://devtools.surf/tools/ascii-box-drawer/) - Wrap any text in a Unicode box - great for READMEs
- [Text Reverser](https://devtools.surf/tools/text-reverser/) - Reverse a string - emoji-safe operates on grapheme clusters
- [Email Extractor](https://devtools.surf/tools/email-extractor/) - Extract every unique email address from a blob of text
- [URL Extractor](https://devtools.surf/tools/url-extractor/) - Extract every unique http/https URL from a blob of text
- [Text Repeater](https://devtools.surf/tools/text-repeater/) - Repeat text N times with a custom separator - newline, space, emoji
- [Title Case Converter](https://devtools.surf/tools/title-case-converter/) - Capitalize words - AP-style, keep small words lowercase unless first/last
- [Whitespace Normalizer](https://devtools.surf/tools/whitespace-normalizer/) - Collapse runs of spaces/tabs, trim lines, drop consecutive blanks
- [Tab to Space Converter](https://devtools.surf/tools/tab-space-converter/) - Switch tabs to N spaces or N spaces back to tabs
- [Line Break Converter](https://devtools.surf/tools/line-break-converter/) - Normalize CRLF / LF / CR line endings across an entire file
- [Line Shuffler](https://devtools.surf/tools/line-shuffler/) - Randomly shuffle every line in your input - Fisher-Yates, deterministic
- [Syllable Counter](https://devtools.surf/tools/syllable-counter/) - Count syllables per word - heuristic-based English estimator
- [Pig Latin Converter](https://devtools.surf/tools/pig-latin-converter/) - Translate English text to pig latin - keeps case, punctuation intact
- [Bold Text Generator](https://devtools.surf/tools/bold-text-generator/) - Turn regular text into unicode - works in bios, Slack, Discord
- [Italic Text Generator](https://devtools.surf/tools/italic-text-generator/) - Turn regular text into unicode - copy/paste anywhere
- [Strikethrough Text Generator](https://devtools.surf/tools/strikethrough-text-generator/) - Add combining-mark strike to any text - no markdown needed
- [Fancy Text Generator](https://devtools.surf/tools/fancy-text-generator/) - 8 unicode style variants - bold, italic, script, fraktur, monospace and more
- [Upside-Down Text](https://devtools.surf/tools/upside-down-text/) - Flip text upside-down using unicode substitutions - p l
- [Small Caps Converter](https://devtools.surf/tools/small-caps-converter/) - Convert normal text to s s - pure unicode, no CSS
- [Circled Text Generator](https://devtools.surf/tools/circled-text-generator/) - Render letters + digits as unicode glyphs
- [Square Text Generator](https://devtools.surf/tools/square-text-generator/) - Render letters as unicode glyphs for banners and bios
- [Superscript & Subscript](https://devtools.surf/tools/superscript-subscript/) - Convert letters/digits to or script - CO, HO, x
- [Emoji Letter Mapper](https://devtools.surf/tools/emoji-letter-mapper/) - Replace letters with regional-indicator and symbol emoji
- [Vaporwave Text](https://devtools.surf/tools/vaporwave-text/) - Convert ASCII to aesthetic letters - vaporwave vibes
- [Cursed Text Generator](https://devtools.surf/tools/cursed-text-generator/) - Stack combining marks above/below letters for a glitchy, cursed look
- [Wide Text Generator](https://devtools.surf/tools/wide-text-generator/) - Add spaces between every character for a stretched / wide look
- [Text Statistics](https://devtools.surf/tools/text-statistics/) - Count words, characters, lines, estimate reading time
- [Language Detector](https://devtools.surf/tools/language-detector/) - Detect text language automatically with confidence scores

## Encoding

- [Base64 Encode](https://devtools.surf/tools/base64-encode/) - Encode text or files to Base64
- [Base64 Decode](https://devtools.surf/tools/base64-decode/) - Decode Base64 back to text or file
- [Hash Generator](https://devtools.surf/tools/hash-generator/) - Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text
- [Number Base Converter](https://devtools.surf/tools/number-base-converter/) - Convert between decimal, hex, octal, and binary
- [Timestamp Converter](https://devtools.surf/tools/timestamp-converter/) - Convert between Unix epoch, ISO 8601, and human-readable dates
- [Base58/Base32/Base85](https://devtools.surf/tools/base58-encoder/) - Encode and decode text in Base58, Base32, or Base85
- [Base64URL Encoder](https://devtools.surf/tools/base64url-encoder/) - Encode URL-safe base64 - + to - , / to _ , no padding
- [Base64URL Decoder](https://devtools.surf/tools/base64url-decoder/) - Decode URL-safe base64 back to UTF-8 text
- [Text to Binary](https://devtools.surf/tools/text-to-binary/) - Convert UTF-8 text to 0/1 binary - or decode back
- [Text to Hex](https://devtools.surf/tools/text-to-hex/) - Encode UTF-8 text to hexadecimal bytes - or decode hex back to text
- [Text to Octal](https://devtools.surf/tools/text-to-octal/) - Encode UTF-8 text to octal digit sequences - or decode octal back
- [ASCII85 Encoder](https://devtools.surf/tools/ascii85-encoder/) - Adobe ASCII85 base85 for compact binary in PDF/PostScript payloads

## Generators

- [UUID Generator](https://devtools.surf/tools/uuid-generator/) - Generate v4 UUIDs - single or bulk
- [ULID Generator](https://devtools.surf/tools/ulid-generator/) - Generate sortable ULIDs Universally Unique Lexicographically Sortable IDs
- [Password Generator](https://devtools.surf/tools/password-generator/) - Generate secure random passwords with custom rules
- [cURL to Code](https://devtools.surf/tools/curl-to-code/) - Convert cURL commands to fetch, axios, Python requests, and more
- [Cron Expression Parser](https://devtools.surf/tools/cron-expression-parser/) - Describe cron expressions in plain English with next run times
- [SQL Formatter](https://devtools.surf/tools/sql-formatter/) - Format and prettify SQL queries
- [GraphQL Formatter](https://devtools.surf/tools/graphql-formatter/) - Format and prettify GraphQL queries and schemas
- [JSON Schema Generator](https://devtools.surf/tools/json-schema-generator/) - Generate JSON Schema from a sample JSON object
- [TypeScript Interface Generator](https://devtools.surf/tools/ts-interface-generator/) - Generate TypeScript interfaces from JSON data
- [Mock Data Generator](https://devtools.surf/tools/mock-data-generator/) - Generate fake names, emails, addresses, and more in JSON or CSV
- [QR Code Generator](https://devtools.surf/tools/qr-code-generator/) - Generate QR codes from text or URLs
- [Chmod Calculator](https://devtools.surf/tools/chmod-calculator/) - Convert between symbolic and numeric Unix file permissions
- [.gitignore Builder](https://devtools.surf/tools/gitignore-builder/) - Build a .gitignore from curated language/framework templates
- [Unix Cron Visualizer](https://devtools.surf/tools/unix-cron-visualizer/) - Visualize cron schedules as a timeline of next executions
- [Chmod to English](https://devtools.surf/tools/chmod-to-english/) - Convert numeric chmod values to human-readable permission descriptions
- [Privacy Policy Generator](https://devtools.surf/tools/privacy-policy-generator/) - Generate a privacy policy from your app name, URL, and data practices
- [Crontab Generator](https://devtools.surf/tools/crontab-generator/) - Build cron schedules visually with dropdowns for each field
- [QR Code Generator](https://devtools.surf/tools/qrcode-generator/) - Generate QR codes with customizable options
- [UUID v7 Generator](https://devtools.surf/tools/uuid-v7-generator/) - Generate UUID v7 with timestamp analysis
- [Nano ID Generator](https://devtools.surf/tools/nano-id-generator/) - Generate Nano IDs with custom alphabet
- [CUID2 Generator](https://devtools.surf/tools/cuid2-generator/) - Generate CUID2 identifiers with timestamps
- [Snowflake ID Generator](https://devtools.surf/tools/snowflake-id-generator/) - Generate Snowflake IDs with component breakdown
- [Random String Generator](https://devtools.surf/tools/random-string-generator/) - Secure random strings - hex, base64, base58, symbols, custom length
- [Fake Name Generator](https://devtools.surf/tools/fake-name-generator/) - Bulk fake first+last names for test fixtures - famous tech names pool
- [Fake Address Generator](https://devtools.surf/tools/fake-address-generator/) - Bulk US-style fake addresses for seeding dev databases
- [Fake Phone Generator](https://devtools.surf/tools/fake-phone-generator/) - Bulk fake phone numbers in US / UK / E.164 formats
- [Test Credit Card Generator](https://devtools.surf/tools/test-credit-card-generator/) - Luhn-valid dev cards for Visa/MC/Amex/Discover/JCB/Diners
- [Test IBAN Generator](https://devtools.surf/tools/iban-test-generator/) - Synthesize IBANs with valid ISO 13616 checksums per country
- [Test VIN Generator](https://devtools.surf/tools/vin-generator/) - Generate random 17-char VINs with valid position-9 check digit
- [Barcode Generator](https://devtools.surf/tools/barcode-generator/) - Generate CODE-128 barcode PNGs from any text - client-side canvas
- [Data URI Generator](https://devtools.surf/tools/data-uri-generator/) - Wrap any text or file contents into a base64 data: URI
- [API Key Generator](https://devtools.surf/tools/api-key-generator/) - Secure random API keys with prefix sk_, pk_, whsec_ - base62 or hex
- [Bcrypt Demo Hash](https://devtools.surf/tools/bcrypt-generator/) - Generate a bcrypt-style hash preview - configurable cost rounds 4-14
- [Argon2 Demo Hash](https://devtools.surf/tools/argon2-generator/) - Generate an argon2id PHC-formatted hash preview for docs / fixtures
- [Shield Badge Generator](https://devtools.surf/tools/shield-badge-generator/) - Build Shields.io README badges - label, message, color, logo, style
- [README.md Generator](https://devtools.surf/tools/readme-md-generator/) - Generate a README template with title, description, install, usage, license
- [.editorconfig Generator](https://devtools.surf/tools/editorconfig-generator/) - Tab/space indent, EOL, charset rules - one config for every editor
- [.prettierrc Generator](https://devtools.surf/tools/prettier-config/) - Build a Prettier config - semi, quote style, trailing comma, width
- [.eslintrc Generator](https://devtools.surf/tools/eslint-config/) - ESLint config for Node / TypeScript / React - commonjs output
- [CHANGELOG.md Generator](https://devtools.surf/tools/changelog-md-generator/) - Keep a Changelog starter with Unreleased + first version section
- [LICENSE File Generator](https://devtools.surf/tools/license-file-generator/) - MIT, Apache 2.0, BSD 3-Clause, GPL 3.0, Unlicense - year + holder
- [Dockerfile Generator](https://devtools.surf/tools/dockerfile-generator/) - Multi-stage Dockerfile for Node / Python / Go - production-ready
- [docker-compose.yml Generator](https://devtools.surf/tools/docker-compose-generator/) - Wire up api + postgres + redis + mongo into a single compose file
- [Makefile Generator](https://devtools.surf/tools/makefile-generator/) - Language-aware Makefile for Node / Python / Go - install/dev/test/build
- [.gitignore Templates](https://devtools.surf/tools/gitignore-templates/) - Combine templates - node, python, go, rust, java, macos, windows, vscode
- [Passphrase Generator EFF](https://devtools.surf/tools/passphrase-generator/) - Memorable multi-word passphrases from a 300-word EFF-style list
- [Advanced Password Generator](https://devtools.surf/tools/password-generator-advanced/) - Character-set algebra, per-position patterns and policy templates, plus a compliance checker

## Color

- [Color Converter](https://devtools.surf/tools/color-converter/) - Convert between HEX, RGB, HSL, OKLCH, and Tailwind colors
- [Color Palette Generator](https://devtools.surf/tools/color-palette-generator/) - Generate complementary, analogous, and triadic color palettes
- [Contrast Checker](https://devtools.surf/tools/contrast-checker/) - Check WCAG AA/AAA contrast ratio between two colors
- [Gradient Generator](https://devtools.surf/tools/gradient-generator/) - Design CSS/SVG gradients and export as CSS, SVG, or Figma tokens
- [Color Contrast Matrix](https://devtools.surf/tools/color-contrast-matrix/) - Test WCAG contrast ratios for every color pair in a palette
- [Hex to Tailwind](https://devtools.surf/tools/colors-to-tailwind/) - Map a hex/rgb color to the nearest Tailwind class
- [Gradient to Code](https://devtools.surf/tools/gradient-to-code/) - Translate a CSS gradient into SwiftUI, Android, and Flutter code
- [Color Name Finder](https://devtools.surf/tools/color-name-finder/) - Find the closest CSS named color to any hex Euclidean in RGB
- [Color Scheme Generator](https://devtools.surf/tools/color-scheme-generator/) - Complementary, analogous, triadic, tetradic & split-comp schemes from a base color
- [Tailwind Color Palette](https://devtools.surf/tools/tailwind-color-palette/) - Full Tailwind CSS v3 color palette - 18 families 11 shades, searchable
- [Material Color Palette](https://devtools.surf/tools/material-color-palette/) - Google Material 2014 palette - families with 50-900 + A100-A700 shades
- [CSS Named Colors](https://devtools.surf/tools/css-named-colors/) - Browse all 147 CSS named colors with hex values - instantly searchable
- [Color Shades & Tints](https://devtools.surf/tools/color-shades-tints/) - Generate 9 darker shades + 9 lighter tints from any base color
- [Complementary Colors](https://devtools.surf/tools/complementary-colors/) - Find the opposite color on the wheel - 180 hue rotation
- [Analogous Colors](https://devtools.surf/tools/analogous-colors/) - Generate colors adjacent on the wheel 30 - gentle, harmonious palettes
- [Triadic Colors](https://devtools.surf/tools/triadic-colors/) - Generate three colors equally spaced on the wheel 120 - vivid & balanced
- [Tetradic Colors](https://devtools.surf/tools/tetradic-colors/) - Four colors at 90 - two complementary pairs for rich palettes
- [Monochromatic Colors](https://devtools.surf/tools/monochromatic-colors/) - Build a single-hue palette - nine lightness steps at the same saturation
- [Random Color Generator](https://devtools.surf/tools/random-color-generator/) - Bulk random colors hex/rgb/hsl - great for placeholders & mocks
- [Color Mixer](https://devtools.surf/tools/color-mixer/) - Blend 2+ colors using perceptual square-mean RGB not linear RGB mud
- [Color Lighten / Darken](https://devtools.surf/tools/color-lighten-darken/) - Shift a color's lightness by +/- N%, preserving hue & saturation
- [Color Temperature Kelvin](https://devtools.surf/tools/color-kelvin-converter/) - Convert 1000-40000K to an RGB approximation Tanner Helland formula
- [Pantone Reference](https://devtools.surf/tools/pantone-reference/) - Search common Pantone PMS spot colors with sRGB approximations

## Networking

- [IP Address Lookup](https://devtools.surf/tools/ip-address-lookup/) - Parse and validate IPv4/IPv6 addresses and CIDR ranges
- [HTTP Status Reference](https://devtools.surf/tools/http-status-reference/) - Quick lookup of HTTP status codes and their meanings
- [DNS Record Explainer](https://devtools.surf/tools/dns-record-explainer/) - Explain A, AAAA, CNAME, MX, TXT, SRV and other DNS records
- [WebSocket Frame Decoder](https://devtools.surf/tools/websocket-frame-decoder/) - Decode WebSocket frame headers and payloads from hex
- [Port Reference Lookup](https://devtools.surf/tools/port-reference-lookup/) - Look up common services for any TCP/UDP port number
- [MIME Type Lookup](https://devtools.surf/tools/mime-type-lookup/) - Convert between file extensions and MIME types
- [Certificate Decoder](https://devtools.surf/tools/cert-decoder/) - Decode X.509 PEM certificates into readable fields
- [HPKP Generator](https://devtools.surf/tools/hpkp-generator/) - Generate HTTP Public Key Pinning headers from a certificate
- [User-Agent Parser](https://devtools.surf/tools/user-agent-parser/) - Parse browser, OS, device from a User-Agent string
- [CORS Header Tester](https://devtools.surf/tools/cors-header-tester/) - Analyze CORS response headers for misconfigurations and security issues
- [CIDR Calculator](https://devtools.surf/tools/cidr-calculator/) - Calculate network address, broadcast, host range from CIDR notation
- [HTTP Header Analyzer](https://devtools.surf/tools/http-header-analyzer/) - Analyze HTTP headers for security, caching, and best practices
- [MAC Address Lookup OUI](https://devtools.surf/tools/mac-address-lookup/) - Identify the manufacturer from a MAC address OUI prefix
- [HTTP Method Reference](https://devtools.surf/tools/http-method-reference/) - Quick reference for all HTTP methods with use cases and safety info
- [Query String Builder](https://devtools.surf/tools/query-string-builder/) - Build ?k=v&k=v strings from key=value lines - repeating keys OK
- [Basic Auth Generator](https://devtools.surf/tools/basic-auth-generator/) - Base64-encode user:pass into an HTTP Basic Authorization header
- [Bearer Token Builder](https://devtools.surf/tools/bearer-token-builder/) - Wrap a raw token in HTTP Authorization + curl + fetch snippets
- [HTTP Header Builder](https://devtools.surf/tools/http-header-builder/) - Compose request headers - output as curl flags and fetch options
- [Subnet Calculator v2](https://devtools.surf/tools/subnet-calculator-v2/) - CIDR to subnet mask, network, broadcast, first/last host, host count
- [IPv6 Expander](https://devtools.surf/tools/ipv6-expander/) - Expand ::abbreviated IPv6 and also emit the canonical compressed form
- [IPv4 to IPv6 Mapper](https://devtools.surf/tools/ipv4-ipv6-converter/) - IPv4-mapped IPv6 address ::ffff:a.b.c.d - RFC 4291 representation
- [RFC Lookup](https://devtools.surf/tools/rfc-lookup/) - Search 25+ foundational RFCs by number, title, or topic
- [Well-Known Ports](https://devtools.surf/tools/well-known-ports/) - 40+ standard TCP/UDP ports - search by number, service, or keyword
- [DNS Query Builder](https://devtools.surf/tools/dns-lookup/) - Build dig/nslookup/resolvectl commands for a domain and decode the answer section you paste back no lookup is performed
- [WHOIS & RDAP Explainer](https://devtools.surf/tools/whois-lookup/) - Build whois/RDAP commands and decode a pasted WHOIS response - dates, EPP status codes, nameservers and redactions no registry is queried
- [IP Geolocation Explainer](https://devtools.surf/tools/ip-geolocation/) - Classify an IP offline, learn what GeoIP can and cannot tell you, and get the commands to query a real GeoIP source
- [Network Calculator](https://devtools.surf/tools/network-calculator/) - CIDR subnet calculator with utilities
- [Port Scan Command Builder](https://devtools.surf/tools/port-scanner-simulator/) - Build nmap/nc/PowerShell scan commands for a host and port range, and annotate scanner output you paste back nothing is scanned here

## PDF

- [Sample PDFs](https://devtools.surf/tools/sample-pdfs/) - Download ready-made sample PDFs of various sizes and page counts
- [PDF Merger](https://devtools.surf/tools/pdf-merger/) - Merge multiple PDFs into a single document
- [PDF Splitter](https://devtools.surf/tools/pdf-splitter/) - Split a PDF by page ranges
- [PDF Compressor](https://devtools.surf/tools/pdf-compressor/) - Shrink PDFs by stripping metadata and unused objects, in the browser
- [Markdown to PDF](https://devtools.surf/tools/markdown-to-pdf/) - Write or paste Markdown and export it as a downloadable PDF
- [Invoice Generator](https://devtools.surf/tools/invoice-generator/) - Create professional invoices from line items and export as PDF
- [TXT to PDF](https://devtools.surf/tools/txt-to-pdf/) - Convert a plain text file into a downloadable PDF
- [HTML to PDF](https://devtools.surf/tools/html-to-pdf/) - Paste HTML or upload an .html file and export as PDF
- [DOCX to PDF](https://devtools.surf/tools/docx-to-pdf/) - Convert a Word .docx document into a PDF
- [ODT to PDF](https://devtools.surf/tools/odt-to-pdf/) - Convert an OpenDocument Text file into a PDF
- [RTF to PDF](https://devtools.surf/tools/rtf-to-pdf/) - Convert a Rich Text .rtf file into a PDF
- [CSV to PDF](https://devtools.surf/tools/csv-to-pdf/) - Render a CSV table into a landscape PDF
- [JSON to PDF](https://devtools.surf/tools/json-to-pdf/) - Pretty-print JSON and export as a readable PDF
- [EPUB to PDF](https://devtools.surf/tools/epub-to-pdf/) - Convert an EPUB ebook any version into a PDF
- [MOBI / AZW to PDF](https://devtools.surf/tools/mobi-to-pdf/) - Convert Kindle MOBI, AZW, or PRC ebooks into a PDF non-DRM
- [FB2 to PDF](https://devtools.surf/tools/fb2-to-pdf/) - Convert a FictionBook .fb2 ebook into a PDF
- [CBZ to PDF](https://devtools.surf/tools/cbz-to-pdf/) - Convert a comic book archive .cbz into an image PDF
- [PDF to TXT](https://devtools.surf/tools/pdf-to-txt/) - Extract plain text content from a PDF document
- [PDF to Images ZIP](https://devtools.surf/tools/pdf-to-images/) - Extract embedded images from a PDF and download as a ZIP

## API / Config

- [REST Handler](https://devtools.surf/tools/rest-handler/) - Lightweight REST client - collections, env vars, history, format converter cURL / Collection JSON / REST Handler YAML
- [OpenAPI Viewer](https://devtools.surf/tools/openapi-viewer/) - Browse endpoints, schemas, and operations from an OpenAPI 3 spec
- [Swagger to Collection JSON](https://devtools.surf/tools/swagger-to-collection/) - Convert an OpenAPI / Swagger spec into a Collection JSON v2.1 payload
- [package.json Analyzer](https://devtools.surf/tools/package-json-analyzer/) - Detect duplicate dependencies and common issues
- [Dockerfile Linter](https://devtools.surf/tools/dockerfile-linter/) - Check Dockerfiles against common best practices
- [Kubernetes Manifest Validator](https://devtools.surf/tools/k8s-manifest-validator/) - Validate required fields in Kubernetes YAML manifests
- [Mock Server Config Generator](https://devtools.surf/tools/mock-server-config/) - Generate stub responses from a JSON Schema
- [API Request Builder](https://devtools.surf/tools/api-request-builder/) - Compose an HTTP request with headers, auth and body - raw HTTP, curl and validation
- [GraphQL Explorer](https://devtools.surf/tools/graphql-explorer/) - Browse a GraphQL schema - types, fields, arguments, deprecations and reverse references
- [gRPC Proto Viewer](https://devtools.surf/tools/grpc-proto-viewer/) - Parse a .proto file - services, messages, JSON mapping and wire-compatibility checks
- [REST API Tester](https://devtools.surf/tools/rest-api-tester/) - Test REST APIs with method, URL, headers, and body simulation
- [SOAP Request Builder](https://devtools.surf/tools/soap-request-builder/) - Build and simulate SOAP XML requests
- [GraphQL Query Builder](https://devtools.surf/tools/graphql-request-builder/) - Build GraphQL queries and mutations with field selection
- [WebSocket Tester](https://devtools.surf/tools/websocket-tester/) - Test WebSocket connections and frame transmission
- [Webhooks Simulator](https://devtools.surf/tools/webhooks-simulator/) - Build a webhook delivery with real Stripe, GitHub, Shopify, Slack or Svix HMAC signatures, the curl to replay it and the retry schedule
- [API Documentation Generator](https://devtools.surf/tools/api-documentation-generator/) - Generate API documentation from request details
- [cURL to Code Generator](https://devtools.surf/tools/curl-to-code-generator/) - Convert cURL commands to code in JavaScript, Python, Go with formatting options
- [Postman Import Converter](https://devtools.surf/tools/postman-import-converter/) - Import and convert Postman collection JSON to various formats cURL, REST, YAML
- [OpenAPI Validator](https://devtools.surf/tools/openapi-validator/) - Validate OpenAPI/Swagger specifications with detailed error reporting and compliance checking
- [Swagger UI Generator](https://devtools.surf/tools/swagger-ui-generator/) - Generate interactive Swagger UI from OpenAPI/Swagger specifications with documentation
- [JSON Schema Builder](https://devtools.surf/tools/json-schema-builder/) - Build and validate JSON schema interactively with property definitions and constraints
- [OpenAPI Schema Generator](https://devtools.surf/tools/openapi-schema-generator/) - Generate OpenAPI schemas from JSON samples with automatic type inference and property detection
- [API Mock Server](https://devtools.surf/tools/api-mock-server/) - Generate mock API responses from JSON schema with status codes, delays, and realistic data
- [API Rate Limiter](https://devtools.surf/tools/api-rate-limiter/) - Simulate API rate limiting with token bucket, sliding window algorithms and quota management
- [API Versioning Simulator](https://devtools.surf/tools/api-versioning-simulator/) - Simulate API version management with endpoint mapping and deprecation scheduling
- [Endpoint Deprecation Tracker](https://devtools.surf/tools/endpoint-deprecation-tracker/) - Track API endpoint deprecation timelines with migration guides and sunset notifications
- [Markdown Linter](https://devtools.surf/tools/markdown-linter/) - Lint markdown files for style consistency, formatting issues, and best practices
- [Markdown Spell Checker](https://devtools.surf/tools/markdown-spell-checker/) - Check markdown documents for spelling errors with smart dictionary and context awareness
- [Documentation Generator](https://devtools.surf/tools/documentation-generator/) - Generate documentation from code comments and function signatures with formatted output
- [API Documentation from Code](https://devtools.surf/tools/api-documentation-from-code/) - Extract routes, path/query params, body fields and status codes from pasted Express, NestJS, Flask, Spring, Gin or Rails code into OpenAPI or Markdown
- [Swagger Docs Generator](https://devtools.surf/tools/swagger-docs-generator/) - Generate Swagger/OpenAPI documentation with paths, schemas, and authentication definitions

## Date / Time

- [Timezone Converter](https://devtools.surf/tools/timezone-converter/) - Convert a date-time between multiple timezones
- [Duration Calculator](https://devtools.surf/tools/duration-calculator/) - Calculate the duration between two dates or times
- [Age Calculator](https://devtools.surf/tools/age-calculator/) - Calculate exact age in years, months, and days from a birthdate
- [Working Day Calculator](https://devtools.surf/tools/working-day-calculator/) - Count business days between two dates excluding weekends
- [Week Number Lookup](https://devtools.surf/tools/week-number-lookup/) - Find the ISO week number for any date
- [Date Offset Calculator](https://devtools.surf/tools/date-offset/) - Add/subtract days, weeks, months, years with weekday result
- [Cron Humanizer](https://devtools.surf/tools/cron-humanizer/) - Explain a cron expression in English + show the next 5 run times
- [Date Format Converter](https://devtools.surf/tools/date-format-converter/) - Show the same instant in ISO, RFC-2822, epoch, DD/MM/YYYY and more
- [Countdown Timer Builder](https://devtools.surf/tools/countdown-timer-builder/) - Build a live <div>-and-JS countdown to any ISO target timestamp
- [Pomodoro Timer Planner](https://devtools.surf/tools/pomodoro-timer/) - Plan a 25/5 Pomodoro session with long break - outputs a timeline
- [ICS Calendar Event Generator](https://devtools.surf/tools/ics-event-generator/) - Build a standards-compliant .ics event file - import to any calendar
- [ISO 8601 Duration Parser](https://devtools.surf/tools/iso-duration-parser/) - Parse P3Y6M4DT12H30M5S into years, months, weeks, days, time
- [Date Range Generator](https://devtools.surf/tools/date-range-generator/) - List every date between start and end - step N days/weeks/months
- [Weekday Calendar](https://devtools.surf/tools/weekday-calendar/) - Render a month-at-a-glance calendar grid - YYYY-MM input

## Security / Crypto

- [Hash Generator v2](https://devtools.surf/tools/hash-generator-v2/) - Generate cryptographic hashes with streaming
- [HMAC Generator v2](https://devtools.surf/tools/hmac-generator-v2/) - Generate HMAC with multiple algorithms
- [JWT Encoder](https://devtools.surf/tools/jwt-encoder/) - Encode a JWT token from header, payload, and secret
- [Bcrypt Hash Tester](https://devtools.surf/tools/bcrypt-hash-tester/) - Generate bcrypt hashes and verify passwords against hashes
- [HMAC Generator](https://devtools.surf/tools/hmac-generator/) - Generate HMAC signatures using SHA-256, SHA-512, and more
- [Password Strength Analyzer](https://devtools.surf/tools/password-strength-analyzer/) - Analyze password strength with entropy and crack-time estimates
- [TOTP / 2FA Generator](https://devtools.surf/tools/totp-generator/) - Generate time-based one-time passwords from a secret key
- [SAML Response Decoder](https://devtools.surf/tools/saml-decoder/) - Decode Base64-encoded SAML responses into readable XML
- [OAuth PKCE Generator](https://devtools.surf/tools/oauth-pkce-generator/) - Generate PKCE parameters with S256/plain support, state, and nonce. Includes OAuth flow examples
- [SSH Key Fingerprint](https://devtools.surf/tools/ssh-key-fingerprint/) - Calculate the fingerprint of an SSH public key
- [CSR Decoder](https://devtools.surf/tools/csr-decoder/) - Decode PEM-encoded Certificate Signing Requests
- [Secrets Scanner](https://devtools.surf/tools/secrets-scanner/) - Scan text/code for leaked API keys, tokens, and credentials
- [RSA Keypair Generator](https://devtools.surf/tools/rsa-keypair-generator/) - Generate RSA public/private keypairs in PEM format
- [JWT Timeline](https://devtools.surf/tools/jwt-timeline/) - Decode JWT + show iat / nbf / exp as ISO + delta from now
- [AES Encrypt / Decrypt](https://devtools.surf/tools/aes-encrypt-decrypt/) - AES-256-GCM encryption with authenticated ciphertext iv:tag:body
- [ROT13 Cipher](https://devtools.surf/tools/rot13-cipher/) - Classic Caesar-13 substitution - encrypt and decrypt are the same op
- [Caesar Cipher](https://devtools.surf/tools/caesar-cipher/) - Shift letters by any N positions 26 - enc/dec with custom shift
- [Vigenre Cipher](https://devtools.surf/tools/vigenere-cipher/) - Polyalphabetic cipher using a keyword - stronger than Caesar
- [Atbash Cipher](https://devtools.surf/tools/atbash-cipher/) - Hebrew alphabet substitution - AtoZ, BtoY - self-inverse
- [Rail Fence Cipher](https://devtools.surf/tools/rail-fence-cipher/) - Transposition cipher in a zig-zag pattern across N rails - enc/dec
- [Password Strength Checker](https://devtools.surf/tools/password-strength-checker/) - Analyze password strength with recommendations
- [File Hasher](https://devtools.surf/tools/file-hasher/) - Calculate file hashes MD5, SHA256, SHA512, etc
- [OAuth Tokenizer](https://devtools.surf/tools/oauth-tokenizer/) - Decode OAuth 2 and OIDC tokens, explain every claim and scope, and name opaque ones
- [JWT Playground](https://devtools.surf/tools/jwt-playground/) - Build or take apart a JWT and see exactly which checks a verifier would fail it on
- [Certificate Parser](https://devtools.surf/tools/certificate-parser/) - Break an X.509 certificate into every extension and test whether it really serves a hostname
- [TLS Cipher Analyzer](https://devtools.surf/tools/tls-cipher-analyzer/) - Grade cipher suites in either spelling and emit a config with the weak ones removed
- [PGP Key Parser](https://devtools.surf/tools/pgp-key-parser/) - Walk every packet of an armoured PGP public key: fingerprint, user IDs, subkeys and checksum
- [SSH Key Converter](https://devtools.surf/tools/ssh-key-converter/) - Convert an SSH public key between OpenSSH, RFC 4716, PEM and JWK, with both fingerprints
- [Entropy Calculator](https://devtools.surf/tools/entropy-calculator/) - Shannon, charset and realistic guessing entropy side by side, with the patterns discounted
- [Bcrypt Simulator](https://devtools.surf/tools/bcrypt-simulator/) - Time real bcrypt on the server and pick the highest cost factor your login budget allows
- [Argon2 Simulator](https://devtools.surf/tools/argon2-simulator/) - Parse Argon2 encoded hashes and model memory, pass and lane settings - no hash is computed
- [TLS Certificate Generator](https://devtools.surf/tools/tls-certificate-generator/) - Generate self-signed TLS certificates with custom CN, validity, and key size configuration
- [CSR Generator](https://devtools.surf/tools/csr-generator/) - Generate Certificate Signing Requests CSR for CAs with subject information
- [Key Pair Generator](https://devtools.surf/tools/key-pair-generator/) - Generate RSA or EC key pairs with configurable key size and curve
- [Signature Verifier](https://devtools.surf/tools/signature-verifier/) - Verify RSA/EC cryptographic signatures with public key validation
- [HMAC Verifier](https://devtools.surf/tools/hmac-verifier/) - Verify HMAC-SHA256 signatures with constant-time comparison analysis
- [Hash Verifier](https://devtools.surf/tools/hash-verifier/) - Verify file/content hash integrity with algorithm detection and mismatch reporting
- [Certificate Chain Validator](https://devtools.surf/tools/certificate-chain-validator/) - Validate certificate chains for completeness, signatures, dates, and trust paths
- [CRL Checker](https://devtools.surf/tools/crl-checker/) - Decode a PEM certificate and CRL and check whether that serial is on that list - no CRL is downloaded and no OCSP responder is contacted
- [OCSP Responder Simulator](https://devtools.surf/tools/ocsp-responder-simulator/) - Decode a certificate's real OCSP responder URL and certID, decode and verify a signed OCSP response, and get the openssl ocsp command
- [Pinning Validator](https://devtools.surf/tools/pinning-validator/) - Validate certificate pinning configurations and verify public key hash pins
- [SQL Injection Detector](https://devtools.surf/tools/sql-injection-detector/) - Detect potential SQL injection vulnerabilities in query strings

## Web / Frontend

- [Meta Tags / OG Previewer](https://devtools.surf/tools/meta-tag-previewer/) - Preview how meta tags and OpenGraph data appear on social platforms
- [Tailwind to CSS](https://devtools.surf/tools/tailwind-to-css/) - Convert Tailwind CSS classes to vanilla CSS properties
- [HTML to React JSX](https://devtools.surf/tools/html-to-jsx/) - Convert HTML to valid React JSX syntax
- [HTML to Markdown](https://devtools.surf/tools/html-to-markdown/) - Convert HTML content to Markdown format
- [SVG to React Component](https://devtools.surf/tools/svg-to-react/) - Convert SVG markup into a React component
- [CSS Unit Converter](https://devtools.surf/tools/css-unit-converter/) - Convert between 14+ CSS units: px, rem, em, vw, vh, vmin, vmax, pt, cm, mm, in, %, ch, ex
- [robots.txt Validator](https://devtools.surf/tools/robots-txt-validator/) - Validate robots.txt syntax and check for common issues
- [Sitemap XML Validator](https://devtools.surf/tools/sitemap-validator/) - Validate sitemap.xml structure and check for common issues
- [RSS/Atom Feed Validator](https://devtools.surf/tools/rss-feed-validator/) - Validate RSS 2.0 and Atom feed XML structure
- [CSS Box Shadow Builder](https://devtools.surf/tools/css-box-shadow-builder/) - Generate CSS box-shadow values from parameters
- [CSS Clip-Path Builder](https://devtools.surf/tools/css-clip-path-builder/) - Generate CSS clip-path polygon values
- [Flexbox Playground](https://devtools.surf/tools/flexbox-playground/) - Generate CSS flexbox layouts from property combinations
- [Cubic Bezier Editor](https://devtools.surf/tools/cubic-bezier-editor/) - Generate CSS cubic-bezier timing functions from control points
- [Accessibility Auditor](https://devtools.surf/tools/a11y-auditor/) - Check HTML for common accessibility issues ARIA, alt text, headings
- [Structured Data Tester](https://devtools.surf/tools/structured-data-tester/) - Validate JSON-LD schema.org structured data
- [OpenGraph Image Debugger](https://devtools.surf/tools/og-image-debugger/) - Validate OpenGraph meta tags and preview how URLs appear when shared
- [Sitemap Generator](https://devtools.surf/tools/sitemap-generator/) - Generate sitemap.xml from a list of URLs with priority and frequency
- [Favicon Checker](https://devtools.surf/tools/favicon-checker/) - Validate favicon HTML tags and preview all icon sizes
- [px to rem Table](https://devtools.surf/tools/px-rem-table/) - Generate a pixel-to-rem scale table for a chosen base size
- [URL Parser](https://devtools.surf/tools/url-parser/) - Break a URL into scheme, host, path, query, fragment
- [Query String to JSON](https://devtools.surf/tools/query-string-to-json/) - Turn ?a=1&b=foo into a flat JSON object
- [Cookie Parser](https://devtools.surf/tools/cookie-parser/) - Parse Cookie / Set-Cookie header into name=value + attribute list
- [HTTP Header Inspector](https://devtools.surf/tools/http-header-inspector/) - Pretty-print raw HTTP headers with inline meanings
- [Form Builder](https://devtools.surf/tools/form-builder/) - Build interactive forms with validation rules, field types, and conditional logic
- [Survey Generator](https://devtools.surf/tools/survey-generator/) - Generate surveys with multiple question types, ratings, and NPS scales
- [Questionnaire Builder](https://devtools.surf/tools/questionnaire-builder/) - Build structured questionnaires with sections, weighted questions, and response scales
- [Landing Page Builder](https://devtools.surf/tools/landing-page-builder/) - Build landing page templates with hero sections, features, and CTAs
- [Email Template Builder](https://devtools.surf/tools/email-template-builder/) - Create responsive email templates with variables, sections, and styling
- [Newsletter Template Builder](https://devtools.surf/tools/newsletter-template-builder/) - Design newsletter templates with article sections, headers, and footers
- [SEO Meta Generator](https://devtools.surf/tools/seo-meta-generator/) - Generate SEO meta tags, Open Graph, and Twitter Card tags for web pages
- [Robots.txt Builder](https://devtools.surf/tools/robots-txt-builder/) - Build robots.txt files with allow/disallow rules and sitemap directives
- [Analytics Tracker Builder](https://devtools.surf/tools/analytics-tracker-builder/) - Build analytics tracking code with event configuration and implementation details
- [Accessibility Checker](https://devtools.surf/tools/accessibility-checker/) - Check HTML content for WCAG accessibility issues and violations
- [Performance Auditor](https://devtools.surf/tools/performance-auditor/) - Audit website performance metrics, load times, and resource usage
- [SEO Analyzer](https://devtools.surf/tools/seo-analyzer/) - Analyze SEO score with recommendations for keywords, headers, and meta tags
- [Broken Link Checker](https://devtools.surf/tools/broken-link-checker/) - Find broken links and validate URLs in HTML content
- [Duplicate Content Detector](https://devtools.surf/tools/duplicate-content-detector/) - Detect duplicate text, phrases, and paragraphs in content
- [Keyword Density Analyzer](https://devtools.surf/tools/keyword-density-analyzer/) - Analyze keyword density and frequency distribution in text
- [Readability Checker](https://devtools.surf/tools/readability-checker/) - Check content readability with Flesch-Kincaid and other readability scores
- [Grammar & Spell Checker](https://devtools.surf/tools/grammar-checker/) - Check content for grammar issues, spelling mistakes, and style improvements
- [Plagiarism Detector](https://devtools.surf/tools/plagiarism-detector/) - Detect plagiarized content and calculate originality percentage
- [Content Quality Scorer](https://devtools.surf/tools/content-quality-scorer/) - Score overall content quality with detailed breakdown of metrics and recommendations

## Data / SQL

- [CSV Viewer](https://devtools.surf/tools/csv-viewer/) - View CSV data in a sortable, filterable table
- [CSV to SQL INSERT](https://devtools.surf/tools/csv-to-sql-insert/) - Generate SQL INSERT statements from CSV data
- [SQL to CSV Fixture](https://devtools.surf/tools/sql-to-csv/) - Convert SQL INSERT statements to CSV format
- [TSV to CSV](https://devtools.surf/tools/tsv-csv-converter/) - Convert between tab-separated and comma-separated values
- [CSV Schema Validator](https://devtools.surf/tools/csv-schema-validator/) - Validate CSV data against a column schema definition
- [SQL to Prisma Schema](https://devtools.surf/tools/sql-to-prisma/) - Convert SQL CREATE TABLE statements to Prisma schema
- [CSV Column Remapper](https://devtools.surf/tools/csv-column-remapper/) - Rename, reorder, or drop columns in CSV data
- [CSV Validator with Schema](https://devtools.surf/tools/csv-validator-schema/) - Validate CSV data against column type definitions
- [SQL Identifier Caser](https://devtools.surf/tools/sql-case-mapper/) - Convert SQL identifiers between snake, camel, and Pascal case
- [Column Extract](https://devtools.surf/tools/column-extract/) - Pull the Nth whitespace-delimited column from each line
- [File Splitter](https://devtools.surf/tools/file-splitter/) - Split large files into chunks by size or line count
- [File Merger](https://devtools.surf/tools/file-merger/) - Merge multiple files together with custom delimiters
- [ProtoBuf to JSON](https://devtools.surf/tools/protobuf-json-converter/) - Convert Protocol Buffers to JSON schema and vice versa
- [MessagePack to JSON](https://devtools.surf/tools/msgpack-converter/) - Convert between MessagePack binary format and JSON
- [Avro to JSON](https://devtools.surf/tools/avro-converter/) - Convert Avro schemas to JSON and generate schemas from data
- [Parquet to JSON](https://devtools.surf/tools/parquet-converter/) - Parse and convert Parquet file metadata to JSON
- [NDJSON Formatter](https://devtools.surf/tools/ndjson-formatter/) - Format, validate, and analyze NDJSON JSON Lines files
- [JSONL Splitter](https://devtools.surf/tools/jsonl-splitter/) - Split large JSONL files into smaller chunks
- [JSONL Merger](https://devtools.surf/tools/jsonl-merger/) - Merge multiple JSONL files together
- [CSV Validator](https://devtools.surf/tools/csv-validator/) - Validate CSV files with schema checking and error reporting
- [Schema Validator](https://devtools.surf/tools/schema-validator/) - Validate JSON/YAML data against JSON Schema definitions
- [TOML Validator](https://devtools.surf/tools/toml-validator/) - Validate TOML configuration syntax with error details
- [INI/Config Validator](https://devtools.surf/tools/ini-validator/) - Validate INI and config file syntax with line-by-line analysis
- [Data Visualization Builder](https://devtools.surf/tools/data-visualization-builder/) - Build interactive data visualizations bar, line, pie charts from structured data
- [Heatmap Generator](https://devtools.surf/tools/heatmap-generator/) - Generate heatmaps from matrix data with color-coded intensity mapping
- [Bubble Chart Generator](https://devtools.surf/tools/bubble-chart-generator/) - Create bubble charts with three data dimensions x, y, size, color
- [Scatter Plot Generator](https://devtools.surf/tools/scatter-plot-generator/) - Generate scatter plots for analyzing relationships between two variables
- [Treemap Generator](https://devtools.surf/tools/treemap-generator/) - Generate treemaps for visualizing hierarchical data with relative sizes
- [Sunburst Diagram Generator](https://devtools.surf/tools/sunburst-generator/) - Create sunburst diagrams for hierarchical data with radial layout
- [Sankey Diagram Generator](https://devtools.surf/tools/sankey-generator/) - Generate Sankey diagrams to visualize flow and distribution of data
- [Chord Diagram Generator](https://devtools.surf/tools/chord-diagram-generator/) - Create chord diagrams to visualize connections between entities
- [Network Graph Visualizer](https://devtools.surf/tools/network-graph-visualizer/) - Visualize network graphs with nodes and edges, community detection
- [Geographic Map Visualizer](https://devtools.surf/tools/map-visualization-generator/) - Generate geographic maps with data overlays and regional highlighting

## Database Tools

- [MongoDB Query Builder](https://devtools.surf/tools/mongodb-query-builder/) - Build MongoDB queries with aggregation pipelines and operations
- [Elasticsearch Query Builder](https://devtools.surf/tools/elasticsearch-query-builder/) - Build Elasticsearch queries with filters and aggregations
- [Redis Command Simulator](https://devtools.surf/tools/redis-command-simulator/) - Simulate Redis commands and data structure operations
- [Cassandra CQL Builder](https://devtools.surf/tools/cassandra-cql-builder/) - Build Cassandra CQL queries with advanced operations
- [DynamoDB Query Simulator](https://devtools.surf/tools/dynamodb-query-simulator/) - Simulate DynamoDB scan and query operations with expressions
- [Firestore Query Builder](https://devtools.surf/tools/firestore-query-builder/) - Build Firestore queries with constraints and filters
- [Graph Database Explorer](https://devtools.surf/tools/graph-database-explorer/) - Explore graph databases with Cypher and Gremlin queries
- [Search Relevance Scorer](https://devtools.surf/tools/search-relevance-scorer/) - Score and rank search results by relevance to query
- [Full-Text Search Analyzer](https://devtools.surf/tools/full-text-search-analyzer/) - Analyze full-text search tokenization and analysis
- [Database Indexing Analyzer](https://devtools.surf/tools/database-indexing-analyzer/) - Derive CREATE INDEX recommendations from your pasted DDL and queries, with column order, redundancy and covering-index advice

## AI / Modern Dev

- [Token Counter](https://devtools.surf/tools/token-counter/) - Estimate tokens, context-window usage and cost for Claude, GPT and Gemini models
- [Prompt Template Renderer](https://devtools.surf/tools/prompt-template-renderer/) - Render prompt templates with variable substitution
- [Markdown to Slack/Discord](https://devtools.surf/tools/markdown-to-slack/) - Convert Markdown to Slack mrkdwn or Discord formatting
- [Embedding Distance Calculator](https://devtools.surf/tools/embedding-distance/) - Calculate cosine similarity between two text embedding vectors
- [Markdown to Slack mrkdwn](https://devtools.surf/tools/slack-mrkdwn/) - Convert GitHub-flavor markdown to Slack's mrkdwn
- [Sentiment Analyzer](https://devtools.surf/tools/sentiment-analyzer/) - Analyze sentiment positive/negative/neutral of text
- [Keyword Extractor](https://devtools.surf/tools/keyword-extractor/) - Extract keywords and phrases from text content
- [Text Summarizer](https://devtools.surf/tools/text-summarizer/) - Summarize long text by extracting key sentences

## Fun / Niche

- [Emoji / Unicode Lookup](https://devtools.surf/tools/emoji-unicode-lookup/) - Search emoji by name and show Unicode codepoints
- [NATO Phonetic Alphabet](https://devtools.surf/tools/nato-phonetic/) - Convert text to NATO phonetic alphabet or decode NATO words back to letters
- [Morse Code to Text](https://devtools.surf/tools/morse-code/) - Convert text to Morse code and back with audio playback and speed control
- [Roman Numeral Converter](https://devtools.surf/tools/roman-numeral-converter/) - Convert between Roman numerals and decimal numbers 1-3,999,999. Supports vinculum notation with underscores for values above 3,999
- [Number to Words](https://devtools.surf/tools/number-to-words/) - Convert numbers to words in English, Spanish, or French. Supports cardinals one, two and ordinals first, second
- [Leet Speak to Plain](https://devtools.surf/tools/leet-speak/) - Convert text to/from 1337 speak
- [Slug Generator](https://devtools.surf/tools/slug-generator/) - Generate URL-friendly slugs from text
- [Zero-Width Character Detector](https://devtools.surf/tools/zero-width-detector/) - Find and highlight invisible zero-width characters in text
- [Smart Quotes Fixer](https://devtools.surf/tools/smart-quotes-fixer/) - Replace curly/smart quotes with straight quotes and vice versa
- [Text Similarity Scorer](https://devtools.surf/tools/text-similarity-scorer/) - Calculate similarity between two text strings Levenshtein, Jaccard
- [ISBN/IBAN/Luhn Validator](https://devtools.surf/tools/isbn-iban-validator/) - Validate ISBN, IBAN, and credit card numbers Luhn check
- [ASCII Table Reference](https://devtools.surf/tools/ascii-table-reference/) - Browse the full ASCII table with decimal, hex, and character values
- [Bionic Reading Converter](https://devtools.surf/tools/bionic-reading/) - Bold the leading part of each word to guide the eye while reading
- [Anagram Finder](https://devtools.surf/tools/anagram-finder/) - Check two strings, search a word list, or list every arrangement of a word's letters
- [Braille to Text](https://devtools.surf/tools/braille-converter/) - Convert text to Braille Unicode characters and back
- [Color Blindness Simulator](https://devtools.surf/tools/color-blindness-simulator/) - Simulate how hex colors appear under different color blindness types
- [User Input Fuzzer](https://devtools.surf/tools/user-input-fuzzer/) - Generate edge-case test inputs for form validation testing
- [Palindrome Checker](https://devtools.surf/tools/palindrome-checker/) - Test if text reads the same forward & backward
- [Haiku Counter](https://devtools.surf/tools/haiku-counter/) - Check a poem fits the 5-7-5 syllable pattern
- [Emoji Counter](https://devtools.surf/tools/emoji-counter/) - Count and group emoji present in any text
- [Zalgo Text](https://devtools.surf/tools/zalgo-generator/) - Corrupt normal text with diacritical fury for fun
- [SpongeBob Case](https://devtools.surf/tools/spongebob-case/) - aLtErNaTiNg cAsE gEnErAtOr - memes only
- [Dice Roller](https://devtools.surf/tools/dice-notation-roller/) - Roll standard RPG dice notation - 3d6+2, 2d20-1, mixed
- [Age on Other Planets](https://devtools.surf/tools/age-in-planets/) - Convert your Earth age to Mercury, Venus, Mars, Jupiter even Pluto
- [Coin Flip Simulator](https://devtools.surf/tools/coin-flip-simulator/) - Flip a fair coin N times - tallies + raw sequence. Optional seed.
- [Random List Picker](https://devtools.surf/tools/random-list-picker/) - Pick a winner from a list - shows the full shuffled order too
- [Decision Wheel](https://devtools.surf/tools/decision-wheel/) - Spin a wheel of N options and get the top 5 picks in random order
- [Fantasy Name Generator](https://devtools.surf/tools/fantasy-name-generator/) - Generate fantasy/elvish-style names for characters, towns, NPCs
- [Compound Word Finder](https://devtools.surf/tools/compound-word-finder/) - Split compound words rainbow to rain+bow, moonlight to moon+light
- [Word Scrambler](https://devtools.surf/tools/word-scrambler/) - Typoglycemia-style scramble: keep first+last letter, shuffle middle

## Developer Utilities

- [Collection JSON to cURL](https://devtools.surf/tools/collection-to-curl/) - Convert a Postman v2.1 or Insomnia collection into cURL, HTTPie or fetch
- [Git Diff to HTML](https://devtools.surf/tools/git-diff-to-html/) - Convert unified git diff output to syntax-highlighted HTML
- [Regex Visualizer](https://devtools.surf/tools/regex-visualizer/) - Visualize a regex as a railroad diagram with a plain-English breakdown
- [Makefile Explainer](https://devtools.surf/tools/makefile-explainer/) - Explain Makefile targets, variables and the execution order of any goal
- [Shell Script Linter](https://devtools.surf/tools/shell-script-linter/) - Lint shell scripts for shellcheck-style issues and get the corrected lines
- [GitHub Actions Visualizer](https://devtools.surf/tools/github-actions-visualizer/) - Parse a GitHub Actions workflow and show job/step dependencies
- [HAR File Viewer](https://devtools.surf/tools/har-file-viewer/) - Explore a HAR network log: waterfall, timings, sizes and findings
- [API Response Mocker](https://devtools.surf/tools/api-response-mocker/) - Generate mock API responses from a schema, example or field list
- [GraphQL Query Builder](https://devtools.surf/tools/graphql-query-builder/) - Generate GraphQL queries from a schema definition
- [OpenAPI to TypeScript](https://devtools.surf/tools/openapi-to-typescript/) - Generate TypeScript interfaces from an OpenAPI schema
- [Diff Patch Applier](https://devtools.surf/tools/diff-patch-applier/) - Apply a unified diff patch to source text
- [GraphQL Introspection to SDL](https://devtools.surf/tools/graphql-introspection-to-sdl/) - Convert GraphQL introspection JSON to SDL schema
- [HTTP Request Replayer](https://devtools.surf/tools/http-request-replayer/) - Generate fetch/axios/curl code from raw HTTP request text
- [cURL to fetch](https://devtools.surf/tools/curl-to-fetch/) - Convert a curl command into a JS fetch call
- [Git Log Parser](https://devtools.surf/tools/git-log-parser/) - Parse git log output into structured JSON
- [HTTP to cURL Builder](https://devtools.surf/tools/http-curl-builder/) - Build a curl command from method, URL, headers & body fields
- [SemVer Bump](https://devtools.surf/tools/semver-bump/) - Compute next major / minor / patch / prerelease
- [Apache/Nginx Log Parser](https://devtools.surf/tools/apache-log-parser/) - Parse combined log format lines into JSON host, status, UA
- [Sed Simulator](https://devtools.surf/tools/sed-simulator/) - Interactive sed command simulator
- [Grep Simulator](https://devtools.surf/tools/grep-simulator/) - Interactive grep pattern matcher
- [AWK Simulator](https://devtools.surf/tools/awk-simulator/) - Interactive AWK processor
- [File Properties](https://devtools.surf/tools/file-properties/) - Analyze file metadata, size, encoding, line count
- [Duplicate File Finder](https://devtools.surf/tools/duplicate-file-finder/) - Find duplicate files by comparing content hashes
- [Rate Limiter Calculator](https://devtools.surf/tools/rate-limiter-calculator/) - Calculate rate limiting scenarios with token bucket algorithms and capacity planning
- [Load Balancer Simulator](https://devtools.surf/tools/load-balancer-simulator/) - Run real round-robin, nginx smooth weighted, ketama consistent-hash, least-connections and power-of-two selection over a pool you describe
- [Circuit Breaker Simulator](https://devtools.surf/tools/circuit-breaker-simulator/) - Run a seeded, reproducible circuit-breaker state machine over synthetic traffic and see exactly when it trips, opens and closes
- [Latency Simulator](https://devtools.surf/tools/latency-simulator/) - Simulate latency impact on performance with waterfall analysis and cascading delays
- [APDEX Scorer](https://devtools.surf/tools/apdex-scorer/) - Calculate Application Performance Index APDEX scores with satisfaction thresholds
- [Error Budget Tracker](https://devtools.surf/tools/error-budget-tracker/) - Track error budget allocation and consumption with burn rate analysis
- [MTTR Analyzer](https://devtools.surf/tools/mttr-analyzer/) - Analyze mean time to repair and incident metrics with P95 calculations
- [Carbon Footprint Estimator](https://devtools.surf/tools/carbon-footprint-estimator/) - Estimate carbon footprint of computation and energy usage
- [Power Consumption Analyzer](https://devtools.surf/tools/power-consumption-analyzer/) - Analyze power draw and requirements for multiple devices and UPS sizing
- [Database Connection Tester](https://devtools.surf/tools/database-connection-tester/) - Test database connections for MySQL, PostgreSQL, SQLite with latency analysis
- [SQL Parser](https://devtools.surf/tools/sql-parser/) - Parse SQL queries and extract structure tables, columns, joins
- [SQL Optimizer](https://devtools.surf/tools/sql-optimizer/) - Analyze SQL queries for optimization suggestions and performance improvements
- [Query Explainer](https://devtools.surf/tools/query-explainer/) - Explain SQL query execution with index analysis and optimization hints
- [Database Schema Validator](https://devtools.surf/tools/database-schema-validator/) - Validate database schemas for naming conventions and best practices
- [Data Migration Simulator](https://devtools.surf/tools/data-migration-simulator/) - Simulate database migration scenarios with data transformation and conflict detection
- [Backup & Restore Simulator](https://devtools.surf/tools/backup-restore-simulator/) - Simulate backup and restore operations with recovery time analysis
- [Database Replication Simulator](https://devtools.surf/tools/database-replication-simulator/) - Simulate database replication scenarios with lag analysis and consistency checking
- [Docker Command Builder](https://devtools.surf/tools/docker-command-builder/) - Build Docker commands with flags for run, build, exec, logs, and more
- [Dockerfile Optimizer](https://devtools.surf/tools/dockerfile-optimizer/) - Analyze and optimize Dockerfiles for size, speed, and best practices
- [Docker Compose Validator](https://devtools.surf/tools/docker-compose-validator/) - Validate docker-compose.yml files with warnings and best practices
- [Kubernetes Manifest Validator](https://devtools.surf/tools/kubernetes-manifest-validator/) - Validate Kubernetes YAML manifests for correctness and best practices
- [Helm Chart Simulator](https://devtools.surf/tools/helm-chart-simulator/) - Simulate Helm chart rendering with value overrides and manifest generation
- [Terraform Plan Analyzer](https://devtools.surf/tools/terraform-plan-analyzer/) - Analyze Terraform execution plans with risk assessment and change summary
- [Ansible Playbook Simulator](https://devtools.surf/tools/ansible-playbook-simulator/) - Simulate Ansible playbook execution with task results and status
- [Vagrant Configuration Builder](https://devtools.surf/tools/vagrant-configuration-builder/) - Generate Vagrant configuration files for VM setup and provisioning
- [Docker Registry Simulator](https://devtools.surf/tools/docker-registry-simulator/) - Simulate Docker registry operations push, pull, list, delete images
- [Container Orchestration Simulator](https://devtools.surf/tools/container-orchestration-simulator/) - Model a Kubernetes rollout: exact pod counts per step for rolling, blue-green, canary and recreate, plus the manifest and kubectl commands
- [Git Command Builder](https://devtools.surf/tools/git-command-builder/) - Build git commands with interactive options for clone, commit, push, pull, merge
- [Git Conflict Resolver](https://devtools.surf/tools/git-conflict-resolver/) - Simulate and guide through git merge conflict resolution strategies
- [Git Diff Analyzer](https://devtools.surf/tools/git-diff-analyzer/) - Parse a pasted unified diff for real insertion/deletion counts, per-file churn, test coverage of the change and risk signals in added lines
- [Git Blame Simulator](https://devtools.surf/tools/git-blame-simulator/) - Simulate git blame functionality to see commit history and authorship of code lines
- [Git Bisect Simulator](https://devtools.surf/tools/git-bisect-simulator/) - Work out how many tests a bisect needs, which commit git picks at each step, and replay the session over your own git log
- [Submodule Manager](https://devtools.surf/tools/submodule-manager/) - Manage git submodules with add, update, remove, and list operations
- [Gitflow Simulator](https://devtools.surf/tools/gitflow-simulator/) - Simulate gitflow workflow scenarios for features, releases, and hotfixes
- [Semantic Versioning Analyzer](https://devtools.surf/tools/semantic-versioning-analyzer/) - Analyze and calculate semantic versioning with major, minor, patch increments
- [Changelog Generator](https://devtools.surf/tools/changelog-generator/) - Generate changelog entries from commits in Keep a Changelog or Conventional formats
- [Commit Message Validator](https://devtools.surf/tools/commit-message-validator/) - Validate commit messages against conventional and imperative style guidelines

## Game Dev

- [Unity Icon Generator](https://devtools.surf/tools/unity-icon-generator/) - One 1024 PNG to every Unity Player-Settings icon size iOS / Android / Standalone / WebGL
- [Android Icon Generator](https://devtools.surf/tools/android-icon-generator/) - Adaptive foreground+background, every mipmap-dpi bucket, Play Store 512, ic_launcher.xml
- [iOS Icon Generator](https://devtools.surf/tools/ios-icon-generator/) - Every iPhone / iPad / App-Store icon size with @1x/@2x/@3x labels + Contents.json
- [Unity C# Class Generator](https://devtools.surf/tools/unity-class-generator/) - Generate Unity MonoBehaviour, ScriptableObject, or Editor scripts from a template
- [Unity Prefab Inspector](https://devtools.surf/tools/unity-prefab-inspector/) - Parse and display Unity .prefab YAML structure in a readable format
- [Sprite Sheet Calculator](https://devtools.surf/tools/sprite-sheet-calculator/) - Calculate frame dimensions, UV coords, and animation timing from sprite sheet parameters
- [Game Math Calculator](https://devtools.surf/tools/game-math-calculator/) - Calculate vectors, distances, dot products, lerp, and common game math operations
- [Game Color Palette Generator](https://devtools.surf/tools/color-palette-game/) - Generate game-ready color palettes with hex, RGB, and normalized float values
- [Tilemap Data Generator](https://devtools.surf/tools/tilemap-generator/) - Generate 2D tilemap arrays for grid-based games from a visual text grid
- [Damage Formula Calculator](https://devtools.surf/tools/damage-formula-calculator/) - Calculate RPG damage with attack, defense, crit, elemental modifiers
- [Loot Table Generator](https://devtools.surf/tools/loot-table-generator/) - Generate weighted loot drop tables with probability calculations
- [Shader Uniform Generator](https://devtools.surf/tools/shader-uniform-generator/) - Generate GLSL/HLSL uniform declarations from parameter descriptions
- [Game Resolution Scaler](https://devtools.surf/tools/game-resolution-scaler/) - Calculate render resolutions, aspect ratios, and DPI for different platforms
- [FPS to Frame Time Converter](https://devtools.surf/tools/fps-ms-converter/) - Convert between FPS and milliseconds per frame with performance budgets
- [Easing Function Generator](https://devtools.surf/tools/easing-function-generator/) - Generate easing functions in C#, GLSL, JS with visual curve preview
- [Game Event System Generator](https://devtools.surf/tools/game-event-system-generator/) - Generate event bus / observer pattern boilerplate for Unity, Godot, or JS
- [State Machine Generator](https://devtools.surf/tools/state-machine-generator/) - Generate finite state machine code from state/transition definitions
- [Platformer Physics Calculator](https://devtools.surf/tools/platformer-physics-calculator/) - Calculate jump height, gravity, velocity for platformer feel
- [Asset Bundle Size Estimator](https://devtools.surf/tools/asset-bundle-size-estimator/) - Estimate build sizes for textures, audio, meshes across platforms

## Animation / CSS

- [CSS Keyframe Generator](https://devtools.surf/tools/css-keyframe-generator/) - Generate @keyframes animations from step definitions
- [Loading Spinner Generator](https://devtools.surf/tools/loading-spinner-generator/) - Generate CSS-only loading spinners and progress indicators
- [Skeleton Screen Generator](https://devtools.surf/tools/skeleton-screen-generator/) - Generate shimmer skeleton placeholder CSS for loading states
- [Hover Effect Generator](https://devtools.surf/tools/hover-effect-generator/) - Generate CSS hover effects for buttons, cards, and links
- [CSS Transition Playground](https://devtools.surf/tools/css-transition-playground/) - Build and preview CSS transitions with property, duration, and easing controls
- [Text Animation Generator](https://devtools.surf/tools/text-animation-generator/) - Generate typewriter, fade-in, bounce, and other text animations
- [Scroll Animation Generator](https://devtools.surf/tools/scroll-animation-generator/) - Generate CSS scroll-triggered animation code with IntersectionObserver
- [Particle Effect Generator](https://devtools.surf/tools/particle-effect-generator/) - Generate CSS-only particle animations confetti, snow, stars
- [Gradient Animation Generator](https://devtools.surf/tools/gradient-animation-generator/) - Generate animated gradient backgrounds with CSS
- [Button Animation Generator](https://devtools.surf/tools/button-animation-generator/) - Generate animated button styles with ripple, glow, and morphing effects

## Calculators

- [Basic Calculator](https://devtools.surf/tools/basic-calculator/) - Evaluate math expressions with +, -, *, /, parentheses, and functions
- [Percentage Calculator](https://devtools.surf/tools/percentage-calculator/) - Calculate percentages, discounts, tips, and markup
- [Unit Converter](https://devtools.surf/tools/unit-converter-calc/) - Convert length, weight, temperature, speed, data, and 8 more unit categories
- [Loan / EMI Calculator](https://devtools.surf/tools/loan-calculator/) - Calculate monthly payments, total interest, and amortization
- [Number Formatter](https://devtools.surf/tools/number-formatter/) - Any number to grouped, compact, scientific, hex, binary, percent
- [Tip Calculator](https://devtools.surf/tools/tip-calculator/) - Calculate tip + per-person split - US-style 15/18/20/22% presets
- [BMI Calculator](https://devtools.surf/tools/bmi-calculator/) - Calculate body mass index with WHO categories - metric or imperial
- [Mortgage Calculator](https://devtools.surf/tools/mortgage-calculator/) - Monthly payment + total interest for any loan amount, rate, term
- [Compound Interest Calculator](https://devtools.surf/tools/compound-interest-calculator/) - Future value with configurable compounding + monthly contributions
- [Discount Calculator](https://devtools.surf/tools/discount-calculator/) - Final price after % off - plus total savings - for quick shopping math
- [Sales Tax Calculator](https://devtools.surf/tools/sales-tax-calculator/) - Add any % sales tax to a subtotal - breakdown + grand total
- [Gas Mileage Calculator](https://devtools.surf/tools/gas-mileage-calculator/) - MPG + L/100km + km/L - US or metric units in one calculator
- [Bill Splitter](https://devtools.surf/tools/bill-splitter/) - Split a bill evenly with tip + optional per-person rounding kitty
- [GPA Calculator](https://devtools.surf/tools/gpa-calculator/) - Compute unweighted 4.0 GPA from course | grade | credits lines
- [Temperature Converter](https://devtools.surf/tools/temperature-converter/) - Convert C / F / K / Rankine all at once - paste any of them
- [Cache TTL Calculator](https://devtools.surf/tools/cache-ttl-calculator/) - Calculate cache TTL and expiration scenarios with freshness analysis
- [Memory Calculator](https://devtools.surf/tools/memory-calculator/) - Calculate memory usage for data structures arrays, linked lists, trees, hash tables
- [Bandwidth Calculator](https://devtools.surf/tools/bandwidth-calculator/) - Calculate bandwidth and transfer time requirements with user scaling analysis
- [Throughput Calculator](https://devtools.surf/tools/throughput-calculator/) - Calculate system throughput and capacity planning with saturation analysis
- [Percentile Calculator](https://devtools.surf/tools/percentile-calculator/) - Calculate percentiles from performance metrics with SLA compliance analysis
- [SLO Calculator](https://devtools.surf/tools/slo-calculator/) - Calculate Service Level Objectives and compliance with downtime allowances
- [Uptime Calculator](https://devtools.surf/tools/uptime-calculator/) - Calculate system uptime and availability percentages with nines notation
- [Cost Per Request Calculator](https://devtools.surf/tools/cost-per-request/) - Calculate cost per request and ROI metrics for infrastructure
- [Energy Consumption Calculator](https://devtools.surf/tools/energy-consumption-calculator/) - Calculate energy consumption of servers and infrastructure with efficiency metrics
- [Cooling Cost Estimator](https://devtools.surf/tools/cooling-cost-estimator/) - Estimate data center cooling costs and efficiency optimization
- [Rack Space Calculator](https://devtools.surf/tools/rack-space-calculator/) - Calculate rack space requirements and capacity planning
- [Advanced Currency Converter](https://devtools.surf/tools/currency-converter-advanced/) - Multi-currency conversion with real-time rates and fee calculations
- [Cryptocurrency Calculator](https://devtools.surf/tools/cryptocurrency-calculator/) - Calculate crypto holdings, gains, price targets, and break-even points
- [Advanced Unit Converter](https://devtools.surf/tools/unit-conversion-advanced/) - Convert between all unit types: length, weight, temperature, volume
- [Advanced Percentage Calculator](https://devtools.surf/tools/percentage-calculator-adv/) - Calculate percentages, increases, decreases with detailed breakdowns
- [Present Value Calculator](https://devtools.surf/tools/present-value-calculator/) - Calculate discount rates and present value from future cash flows
- [Annuity Calculator](https://devtools.surf/tools/annuity-calculator/) - Calculate annuity payments, present/future values, and payment schedules
- [Asset Depreciation Calculator](https://devtools.surf/tools/depreciation-calculator/) - Calculate asset depreciation: straight-line or declining balance methods
- [Loan Amortization Calculator](https://devtools.surf/tools/amortization-calculator/) - Generate detailed amortization schedules with principal/interest breakdown
- [Financial Ratio Calculator](https://devtools.surf/tools/financial-ratio-calculator/) - Calculate ROE, ROA, profit margins, debt ratios, and efficiency metrics
- [Recipe Scaler](https://devtools.surf/tools/recipe-scaler/) - Scale recipe ingredients up or down based on desired servings
- [Cooking Time Converter](https://devtools.surf/tools/cooking-time-converter/) - Convert cooking times and temperatures between ovens and cooking methods
- [Nutrition Calculator](https://devtools.surf/tools/nutrition-calculator/) - Calculate nutritional values calories, macros from ingredient weights
- [Meal Planner](https://devtools.surf/tools/meal-planner/) - Plan weekly meals with shopping lists and nutrition tracking
- [Diet Tracker](https://devtools.surf/tools/diet-tracker/) - Track daily food intake and analyze nutritional balance
- [Water Reminder Calculator](https://devtools.surf/tools/water-reminder-calculator/) - Calculate optimal daily water intake and create reminder schedule
- [Sleep Calculator](https://devtools.surf/tools/sleep-calculator/) - Calculate optimal sleep times based on sleep cycles and wake time
- [Workout Planner](https://devtools.surf/tools/workout-planner/) - Plan workout routines with exercises, sets, reps, and rest periods
- [Fitness Tracker](https://devtools.surf/tools/fitness-tracker/) - Track fitness activities, calories burned, and progress over time
- [Heart Rate Calculator](https://devtools.surf/tools/heart-rate-calculator/) - Calculate target heart rate zones for different exercise intensities
- [Health BMI Calculator](https://devtools.surf/tools/health-bmi-calculator/) - Calculate BMI with health categories, ideal weight range, and health assessment
- [Calorie Calculator](https://devtools.surf/tools/calorie-calculator/) - Calculate daily calorie needs TDEE based on age, weight, height, activity level
- [Macro Calculator](https://devtools.surf/tools/macro-calculator/) - Calculate macronutrient ratios protein, carbs, fat for different dietary goals
- [Water Intake Calculator](https://devtools.surf/tools/water-intake-calculator/) - Calculate recommended daily water intake based on weight, activity, and climate
- [Exercise Duration Calculator](https://devtools.surf/tools/exercise-duration-calculator/) - Calculate calories burned, fat loss, and recovery time for different exercises
- [Weight Loss Calculator](https://devtools.surf/tools/weight-loss-calculator/) - Calculate weight loss timeline and milestones based on calorie deficit
- [Pregnancy Due Date Calculator](https://devtools.surf/tools/pregnancy-due-date-calculator/) - Calculate estimated due date EDD, current week, and pregnancy milestones
- [Fertility Calculator](https://devtools.surf/tools/fertility-calculator/) - Calculate fertility window, ovulation date, and optimal conception days
- [Medication Dosage Calculator](https://devtools.surf/tools/medication-dosage-calculator/) - Calculate medication dosages based on patient weight and prescription frequency
- [Learning Time Calculator](https://devtools.surf/tools/learning-time-calculator/) - Estimate time needed to master a topic based on complexity and prior knowledge
- [Study Planner](https://devtools.surf/tools/study-planner/) - Create a study schedule with optimal allocation across subjects and time
- [Exam Score Calculator](https://devtools.surf/tools/exam-score-calculator/) - Calculate exam scores with letter grades, percentages, and weighted components
- [Scholarship Estimator](https://devtools.surf/tools/scholarship-estimator/) - Estimate scholarship eligibility based on academic performance and demographics
- [Student Loan Calculator](https://devtools.surf/tools/student-loan-calculator/) - Calculate monthly loan payments, total interest, and repayment timelines
- [Grade Analyzer](https://devtools.surf/tools/grade-analyzer/) - Analyze grade distribution with statistics: mean, median, variance, and trends
- [Course Difficulty Analyzer](https://devtools.surf/tools/course-difficulty-analyzer/) - Assess course difficulty based on time requirements, resources, and prerequisites
- [Study Group Organizer](https://devtools.surf/tools/study-group-organizer/) - Organize study groups with agendas, member coordination, and session planning
- [Note-Taking Optimizer](https://devtools.surf/tools/note-taking-optimizer/) - Optimize note-taking methods with layout guides and review time recommendations
- [Car Loan Calculator](https://devtools.surf/tools/car-loan-calculator/) - Calculate car loan payments, interest, and amortization schedules
- [Auto Insurance Calculator](https://devtools.surf/tools/auto-insurance-calculator/) - Calculate auto insurance premiums based on vehicle and driver profile
- [Fuel Economy Calculator](https://devtools.surf/tools/fuel-economy-calculator/) - Calculate MPG, fuel costs, and efficiency metrics for vehicles
- [Maintenance Cost Calculator](https://devtools.surf/tools/maintenance-cost-calculator/) - Calculate vehicle maintenance costs and service schedules
- [Vehicle Depreciation Calculator](https://devtools.surf/tools/vehicle-depreciation-calculator/) - Calculate vehicle depreciation over time and residual values
- [Resale Value Estimator](https://devtools.surf/tools/resale-value-estimator/) - Estimate vehicle resale values based on condition and market data
- [Roadtrip Budget Planner](https://devtools.surf/tools/roadtrip-budget-planner/) - Plan roadtrip budgets with fuel, accommodation, and food costs
- [Car Comparison Tool](https://devtools.surf/tools/car-comparison-tool/) - Compare vehicles by specs, cost, fuel economy, and features
- [Parking Cost Calculator](https://devtools.surf/tools/parking-cost-calculator/) - Calculate parking costs for different durations and rates
- [Vehicle Registration Calculator](https://devtools.surf/tools/vehicle-registration-calculator/) - Calculate vehicle registration fees and renewal costs

## Audio

- [Sample Audio Files](https://devtools.surf/tools/sample-audio/) - Download forest-ambience clips in WAV, MP3, Opus, FLAC, AAC, WebM
- [Audio Converter](https://devtools.surf/tools/audio-converter/) - Convert between WAV, MP3, Opus, AAC and more - 100% in-browser
- [Audio Merger](https://devtools.surf/tools/audio-merger/) - Join multiple clips back-to-back into one track
- [Audio Editor](https://devtools.surf/tools/audio-editor/) - Trim, fade, amplify, change speed - all client-side

## Cheatsheets

- [Git Cheatsheet](https://devtools.surf/tools/cheatsheet-git/) - Everyday Git commands - setup, commit, branch, remote, undo
- [Docker Cheatsheet](https://devtools.surf/tools/cheatsheet-docker/) - Docker + Compose commands for images, containers, volumes, Dockerfile
- [Makefile Cheatsheet](https://devtools.surf/tools/cheatsheet-makefile/) - Rules, variables, functions, pattern matching, advanced features
- [Regex Cheatsheet](https://devtools.surf/tools/cheatsheet-regex/) - Character classes, quantifiers, anchors, groups, flags
- [Markdown Cheatsheet](https://devtools.surf/tools/cheatsheet-markdown/) - CommonMark + GitHub-flavored Markdown syntax at a glance
- [Vim Cheatsheet](https://devtools.surf/tools/cheatsheet-vim/) - Modal editing essentials - modes, motions, edits, files
- [Bash / Shell Cheatsheet](https://devtools.surf/tools/cheatsheet-bash/) - Navigation, text processing, pipes, processes, scripting basics
- [SQL Cheatsheet](https://devtools.surf/tools/cheatsheet-sql/) - SELECT, JOIN, aggregates, window functions, upsert
- [kubectl Cheatsheet](https://devtools.surf/tools/cheatsheet-kubectl/) - Inspect, logs, apply, scale, context switching for Kubernetes
- [npm / yarn / pnpm Cheatsheet](https://devtools.surf/tools/cheatsheet-npm/) - Install, run, audit across all three package managers
- [TypeScript Cheatsheet](https://devtools.surf/tools/cheatsheet-typescript/) - Types, generics, utility types, narrowing, tsconfig essentials
- [LLM Prompting Techniques](https://devtools.surf/tools/cheatsheet-llm-prompting/) - Basic to advanced prompting techniques - chain-of-thought, few-shot, system prompts, patterns
- [CSS Flexbox Cheatsheet](https://devtools.surf/tools/cheatsheet-flexbox/) - Container + item props, common patterns centered, sidebar, sticky footer
- [CSS Grid Cheatsheet](https://devtools.surf/tools/cheatsheet-grid/) - Template, placement, auto-fit, named areas, holy grail
- [Tailwind CSS Cheatsheet](https://devtools.surf/tools/cheatsheet-tailwind/) - Layout, spacing, colors, variants, and pro tricks
- [Python Cheatsheet](https://devtools.surf/tools/cheatsheet-python/) - Collections, comprehensions, dataclasses, useful stdlib modules
- [React Hooks Cheatsheet](https://devtools.surf/tools/cheatsheet-react-hooks/) - State, memo, effects, context, custom hooks, newer APIs
- [Nginx Cheatsheet](https://devtools.surf/tools/cheatsheet-nginx/) - Reverse proxy, static + SPA fallback, HTTPS, ops commands
- [SSH Cheatsheet](https://devtools.surf/tools/cheatsheet-ssh/) - Keys, connect, port forwarding, ~/.ssh/config, file transfer
- [tmux Cheatsheet](https://devtools.surf/tools/cheatsheet-tmux/) - Sessions, windows, panes, copy mode for persistent terminals
- [cURL Cheatsheet](https://devtools.surf/tools/cheatsheet-curl/) - HTTP from the CLI - methods, headers, auth, timing, retries
- [HTTP Headers Cheatsheet](https://devtools.surf/tools/cheatsheet-http-headers/) - Request + response headers and a caching decision tree
- [JWT Cheatsheet](https://devtools.surf/tools/cheatsheet-jwt/) - Structure, standard claims, algorithms, do/don't
- [PostgreSQL Cheatsheet](https://devtools.surf/tools/cheatsheet-postgres/) - psql meta-commands, JSONB, indexing, EXPLAIN

## Info / Guides

- [Docker Basics](https://devtools.surf/tools/info-docker-basics/) - What containers are, why they're useful, first run, common pitfalls
- [SEO Basics for Developers](https://devtools.surf/tools/info-seo-basics/) - Technical SEO, on-page signals, structured data, what to skip
- [REST API Basics](https://devtools.surf/tools/info-rest-api-basics/) - HTTP verbs, status codes, resource naming, common gotchas
- [Next.js App Router Basics](https://devtools.surf/tools/info-nextjs-app-router-basics/) - File conventions, server vs client, data fetching, snags
- [Connect Your Site to Google](https://devtools.surf/tools/info-google-setup/) - Search Console, GA4, Tag Manager, Ads - end-to-end setup order
- [Git Basics First Hour](https://devtools.surf/tools/info-git-basics/) - Mental model, first workflow, daily loop, undo cookbook
- [Kubernetes Basics](https://devtools.surf/tools/info-kubernetes-basics/) - Pods, deployments, services, YAML, when to reach for k8s
- [GraphQL vs REST](https://devtools.surf/tools/info-graphql-vs-rest/) - When each wins, and the hidden costs of GraphQL at scale
- [WebSockets Basics](https://devtools.surf/tools/info-websockets-basics/) - Lifecycle, browser API, when to use, production gotchas
- [OAuth 2.0 Flows Explained](https://devtools.surf/tools/info-oauth2-flows/) - Auth code + PKCE, client credentials, device, token types, scopes
- [TLS / HTTPS Basics](https://devtools.surf/tools/info-tls-https-basics/) - Handshake, certs, Let's Encrypt, hardening to A+
- [Core Web Vitals](https://devtools.surf/tools/info-core-web-vitals/) - LCP, INP, CLS - what they are, how to fix, how to measure
- [CORS Explained](https://devtools.surf/tools/info-cors-explained/) - Same-origin rule, simple vs preflight, server headers, gotchas
- [Cookies vs localStorage vs sessionStorage](https://devtools.surf/tools/info-cookies-storage/) - Lifetime, security, cross-tab, cookie attributes, anti-patterns
- [Monorepos Turbo / Nx / pnpm](https://devtools.surf/tools/info-monorepos/) - When to monorepo, tool choice, pitfalls
- [Redis Basics](https://devtools.surf/tools/info-redis-basics/) - Data types, caching pattern, operational commands, pitfalls
- [PostgreSQL Basics](https://devtools.surf/tools/info-postgres-basics/) - Why Postgres, first queries, unique features, beginner mistakes
- [CI/CD with GitHub Actions Basics](https://devtools.surf/tools/info-github-actions/) - Anatomy, minimal workflow, triggers, secrets, deploy gotchas
- [Serverless vs Containers vs VMs](https://devtools.surf/tools/info-serverless-vs-containers/) - Where each wins; when serverless bites
- [Microservices vs Monolith](https://devtools.surf/tools/info-microservices-vs-monolith/) - Default to monolith; when to split; the modular-monolith middle path
- [DNS Basics](https://devtools.surf/tools/info-dns-basics/) - Record types, resolution, debugging, common snags
- [Load Balancing Basics](https://devtools.surf/tools/info-load-balancing/) - L4 vs L7, algorithms, health checks, failure modes
- [Caching Strategies](https://devtools.surf/tools/info-caching-strategies/) - Where to cache, patterns, invalidation, common bugs
- [Observability: Logs, Metrics, Traces](https://devtools.surf/tools/info-observability/) - Three pillars, RED/USE metrics, OpenTelemetry, tooling
- [SemVer & Dependency Hygiene](https://devtools.surf/tools/info-semver-dependencies/) - Version ranges, lockfile, update strategy, supply-chain hygiene
- [HTTP Status Codes](https://devtools.surf/tools/http-status-codes/) - Complete reference of HTTP status codes with meanings
- [HTTP Headers Reference](https://devtools.surf/tools/http-headers-reference/) - Search and reference HTTP request/response headers
- [MIME Types Reference](https://devtools.surf/tools/mime-types-reference/) - Lookup MIME types and file extension mappings
- [HTTP Methods Reference](https://devtools.surf/tools/http-methods-reference/) - Reference for HTTP methods GET, POST, PUT, etc.

## DevOps / CI-CD

- [CI/CD Pipeline Builder](https://devtools.surf/tools/ci-cd-pipeline-builder/) - Build CI/CD pipeline configurations for GitHub, GitLab, Jenkins, and more
- [GitHub Actions Generator](https://devtools.surf/tools/github-actions-generator/) - Generate GitHub Actions workflow YAML with triggers and jobs
- [GitLab CI Generator](https://devtools.surf/tools/gitlab-ci-generator/) - Generate GitLab CI pipeline configurations with stages and jobs
- [Jenkins Pipeline Simulator](https://devtools.surf/tools/jenkins-pipeline-simulator/) - Review a Jenkinsfile for real and model a seeded, reproducible pipeline run against a stated duration model
- [CircleCI Config Builder](https://devtools.surf/tools/circleci-config-builder/) - Build CircleCI configuration files with workflows and jobs
- [Travis CI Simulator](https://devtools.surf/tools/travis-ci-simulator/) - Expand a .travis.yml into its real build matrix, model a seeded run, and get the equivalent GitHub Actions workflow
- [Coverage Report Analyzer](https://devtools.surf/tools/codecov-report-analyzer/) - Parse lcov, Cobertura, JaCoCo, Istanbul JSON, Go and text coverage reports for real totals, failing files and uncovered lines
- [Dependency Checker](https://devtools.surf/tools/dependency-checker/) - Check dependencies for security vulnerabilities and outdated packages
- [License Compliance Checker](https://devtools.surf/tools/license-compliance-checker/) - Verify project dependencies comply with approved open-source licenses
- [Build Optimization Analyzer](https://devtools.surf/tools/build-optimization-analyzer/) - Analyze bundle size, build metrics, and optimization recommendations
- [Code Review Simulator](https://devtools.surf/tools/code-review-simulator/) - Build a reviewer checklist and draft comments from a unified diff you paste static analysis, not an AI review
- [Pull Request Template Generator](https://devtools.surf/tools/pull-request-template-generator/) - Generate .github/pull_request_template.md from the sections you pick, with presets and multi-template bundles
- [Issue Template Generator](https://devtools.surf/tools/issue-template-generator/) - Generate GitHub issue forms .yml or legacy Markdown templates with validated fields, labels and config.yml
- [GitHub Labels Manager](https://devtools.surf/tools/github-labels-manager/) - Audit a pasted labels export for duplicates, colours and gaps, then export JSON, CSV or a gh label script
- [Milestone Planner](https://devtools.surf/tools/milestone-planner/) - Plan milestones from a pasted issue list: dependency order, sprint packing, dates and a burndown projection
- [Project Board Simulator](https://devtools.surf/tools/project-board-simulator/) - Lay out a pasted issue list as a board with columns, WIP limits, point totals and per-person load
- [Branch Naming Validator](https://devtools.surf/tools/branch-naming-validator/) - Validate branch names against naming conventions and patterns with suggestions
- [PR Metrics Analyzer](https://devtools.surf/tools/pr-metrics-analyzer/) - Analyze a pasted PR export CSV or JSON for cycle time, review latency, size distribution and bottlenecks
- [Contributor Stats](https://devtools.surf/tools/contributor-stats/) - Parse a git log or shortlog dump into per-author commits, churn, active periods and a bus-factor estimate
- [Repository Health Checker](https://devtools.surf/tools/repository-health-checker/) - Score a repository's essentials from a pasted file listing README, LICENSE, CI, tests, templates with fixes

## Diagrams & Workflows

- [Architecture Diagram Generator](https://devtools.surf/tools/architecture-diagram-generator/) - Generate system architecture diagrams with components, services, and data flows
- [Database Schema Diagram](https://devtools.surf/tools/database-diagram-generator/) - Generate database schema diagrams with tables, relationships, and field definitions
- [Sequence Diagram Generator](https://devtools.surf/tools/sequence-diagram-generator/) - Generate sequence diagrams showing interaction flows between components and actors
- [Entity Relationship Diagram](https://devtools.surf/tools/entity-relationship-generator/) - Generate ER diagrams with entities, attributes, and relationship cardinality
- [Deployment Diagram Generator](https://devtools.surf/tools/deployment-diagram-generator/) - Generate deployment architecture diagrams with infrastructure, services, and cloud components
- [Flowchart Generator](https://devtools.surf/tools/flowchart-generator/) - Generate flowcharts from text descriptions with decision nodes, processes, and flows
- [Mind Map Generator](https://devtools.surf/tools/mindmap-generator/) - Create mind maps from topic outlines with hierarchical structure and branches
- [Timeline Generator](https://devtools.surf/tools/timeline-generator/) - Generate timelines from event descriptions with dates and milestones
- [Gantt Chart Generator](https://devtools.surf/tools/gantt-chart-generator/) - Create Gantt charts for project planning with tasks, dependencies, and duration
- [Kanban Board Simulator](https://devtools.surf/tools/kanban-simulator/) - Simulate kanban board workflows with columns, card movement, and WIP limits
- [PERT Chart Generator](https://devtools.surf/tools/pert-chart-generator/) - Generate PERT charts for project planning with optimistic, pessimistic, and expected times
- [Network Diagram Generator](https://devtools.surf/tools/network-diagram-generator/) - Create network topology diagrams showing systems, connections, and data flow
- [State Diagram Generator](https://devtools.surf/tools/state-diagram-generator/) - Generate state machine diagrams with states, transitions, and triggers
- [Use Case Diagram Generator](https://devtools.surf/tools/use-case-diagram-generator/) - Generate UML use case diagrams with actors, use cases, and relationships
- [Class Diagram Generator](https://devtools.surf/tools/class-diagram-generator/) - Generate UML class diagrams with classes, attributes, methods, and relationships

## Statistics

- [A/B Test Calculator](https://devtools.surf/tools/a-b-test-calculator/) - Calculate A/B test results and statistical significance
- [Statistical Significance Tester](https://devtools.surf/tools/statistical-significance-tester/) - Test statistical significance of two samples
- [Confidence Interval Calculator](https://devtools.surf/tools/confidence-interval-calculator/) - Calculate confidence intervals for population parameters
- [Sample Size Calculator](https://devtools.surf/tools/sample-size-calculator/) - Calculate required sample size for statistical tests
- [Chi-Square Tester](https://devtools.surf/tools/chi-square-tester/) - Test chi-square statistics for categorical data
- [T-Test Calculator](https://devtools.surf/tools/t-test-calculator/) - Calculate t-test results for comparing means
- [Correlation Analyzer](https://devtools.surf/tools/correlation-analyzer/) - Analyze correlation between variables
- [Regression Analyzer](https://devtools.surf/tools/regression-analyzer/) - Analyze regression models and coefficients
- [Distribution Analyzer](https://devtools.surf/tools/distribution-analyzer/) - Analyze probability distributions and statistics
- [Hypothesis Tester](https://devtools.surf/tools/hypothesis-tester/) - Test statistical hypotheses with detailed results

## Career & Professional

- [Career Path Planner](https://devtools.surf/tools/career-path-planner/) - Plan career progression with milestones, skills, and timeline
- [Salary Negotiation Calculator](https://devtools.surf/tools/salary-negotiation-calculator/) - Calculate salary negotiation ranges based on market data and experience
- [Job Offer Analyzer](https://devtools.surf/tools/job-offer-analyzer/) - Analyze and compare job offers with detailed scoring and benefits breakdown
- [Resume Keyword Optimizer](https://devtools.surf/tools/resume-keyword-optimizer/) - Optimize resume keywords for applicant tracking systems ATS
- [Interview Preparation Planner](https://devtools.surf/tools/interview-preparation-planner/) - Plan interview preparation with timeline, question strategies, and practice tips
- [Skill Gap Analyzer](https://devtools.surf/tools/skill-gap-analyzer/) - Analyze skill gaps for target roles and create development roadmap
- [Professional Network Builder](https://devtools.surf/tools/professional-network-builder/) - Plan professional networking activities and relationship building strategy
- [Freelance Rate Calculator](https://devtools.surf/tools/freelance-rate-calculator/) - Calculate freelance rates based on experience, market rates, and project complexity
- [Side Hustle Estimator](https://devtools.surf/tools/side-hustle-estimator/) - Estimate side hustle income potential with time and cost projections
- [Personal Brand Evaluator](https://devtools.surf/tools/personal-brand-evaluator/) - Evaluate personal brand strength with detailed assessment and improvement recommendations

## Event Planning

- [Event Planning Calculator](https://devtools.surf/tools/event-planning-calculator/) - Calculate event timelines, tasks, and budget allocations
- [Wedding Budget Planner](https://devtools.surf/tools/wedding-budget-planner/) - Plan and track wedding expenses across all categories
- [Party Planner](https://devtools.surf/tools/party-planner/) - Plan parties with guest counts, food, drinks, and decoration estimates
- [Venue Capacity Calculator](https://devtools.surf/tools/venue-capacity-calculator/) - Calculate venue space requirements based on event type and guest count
- [Catering Calculator](https://devtools.surf/tools/catering-calculator/) - Calculate catering quantities, portions, and costs for events
- [Seating Chart Generator](https://devtools.surf/tools/seating-chart-generator/) - Generate optimal seating arrangements for events
- [Event Timeline Planner](https://devtools.surf/tools/event-timeline-planner/) - Create detailed event timelines with tasks and milestones
- [Guest List Manager](https://devtools.surf/tools/guest-list-manager/) - Manage guest lists, RSVPs, dietary restrictions, and contact information
- [Decoration Budget Planner](https://devtools.surf/tools/decoration-budget-planner/) - Plan decoration budgets with itemized costs and vendor quotes
- [Event Checklist Generator](https://devtools.surf/tools/event-checklist-generator/) - Generate comprehensive event checklists by event type and timeline

## Travel

- [Travel Itinerary Planner](https://devtools.surf/tools/travel-itinerary-planner/) - Plan travel itineraries with daily activities and budgets
- [Flight Cost Model](https://devtools.surf/tools/flight-price-calculator/) - Model a flight's total cost from your own base fare - passengers, cabin, bags, fees and taxes, with every assumption shown not a fare quote
- [Hotel Cost Estimator](https://devtools.surf/tools/hotel-cost-estimator/) - Estimate hotel costs and booking requirements by location and rating
- [Travel Budget Planner](https://devtools.surf/tools/travel-budget-planner/) - Plan travel budgets across flights, hotels, and daily expenses
- [Packing List Generator](https://devtools.surf/tools/packing-list-generator/) - Generate packing lists based on trip type, duration, and climate
- [Currency Exchange Calculator](https://devtools.surf/tools/currency-exchange-calculator/) - Calculate currency exchanges and conversion rates for travel
- [Travel Distance Calculator](https://devtools.surf/tools/travel-distance-calculator/) - Great-circle distance, bearing and midpoint between cities, airport codes or raw coordinates, plus a route and time estimate with stated assumptions
- [Visa Requirement Checker](https://devtools.surf/tools/visa-requirement-checker/) - Check visa requirements and documents needed by country
- [Travel Insurance Calculator](https://devtools.surf/tools/travel-insurance-calculator/) - Calculate travel insurance costs and coverage options
- [Travel Health Advisor](https://devtools.surf/tools/travel-health-advisor/) - Provide travel health recommendations and vaccination advice

## Real Estate & Home

- [Real Estate Investment Calculator](https://devtools.surf/tools/real-estate-calculator/) - Calculate real estate investment metrics like ROI and cap rate
- [Mortgage Refinance Analyzer](https://devtools.surf/tools/mortgage-refinance-analyzer/) - Analyze mortgage refinancing scenarios and break-even periods
- [Property Tax Calculator](https://devtools.surf/tools/property-tax-calculator/) - Calculate property taxes with exemptions and assessments
- [Home Renovation Budget Planner](https://devtools.surf/tools/home-renovation-budget/) - Plan home renovation budgets with ROI estimates
- [Interior Design Planner](https://devtools.surf/tools/interior-design-planner/) - Plan interior designs with budget allocation and style recommendations
- [Furniture Layout Designer](https://devtools.surf/tools/furniture-layout-designer/) - Design furniture layouts for rooms with spacing recommendations
- [Home Automation Cost Calculator](https://devtools.surf/tools/home-automation-calculator/) - Calculate home automation equipment and installation costs
- [Utility Cost Estimator](https://devtools.surf/tools/utility-cost-estimator/) - Estimate monthly and annual utility costs for homes
- [Home Insurance Calculator](https://devtools.surf/tools/home-insurance-calculator/) - Calculate home insurance premiums and deductible options
- [Property Maintenance Planner](https://devtools.surf/tools/property-maintenance-planner/) - Plan property maintenance schedules and reserve funds

## Business & Corporate

- [Business Name Generator](https://devtools.surf/tools/business-name-generator/) - Generate business names scored on length, syllables and spelling clarity, with the commands and registrar links to check domain availability yourself
- [Business Plan Outliner](https://devtools.surf/tools/business-plan-outliner/) - Create detailed business plan outlines with all essential sections
- [Startup Cost Calculator](https://devtools.surf/tools/startup-cost-calculator/) - Calculate total startup costs for new ventures across categories
- [Business License Tracker](https://devtools.surf/tools/business-license-tracker/) - Track and manage business licenses, permits, and renewal dates
- [Business Insurance Calculator](https://devtools.surf/tools/business-insurance-calculator/) - Calculate business insurance premiums and coverage recommendations
- [Vendor Comparison Tool](https://devtools.surf/tools/vendor-comparison-tool/) - Compare vendors and suppliers by price, quality, and terms
- [Supplier Database Builder](https://devtools.surf/tools/supplier-database-builder/) - Build and organize supplier databases with contact and pricing info
- [Contract Template Generator](https://devtools.surf/tools/contract-template-generator/) - Generate customizable contract templates for business agreements
- [Negotiation Checklist Generator](https://devtools.surf/tools/negotiation-checklist-generator/) - Generate negotiation checklists and strategy guides for deals
- [Procurement Automation](https://devtools.surf/tools/procurement-automation/) - Automate procurement processes and streamline approval workflows
- [Inventory Turnover Calculator](https://devtools.surf/tools/inventory-turnover-calculator/) - Calculate inventory turnover rates and optimize stock levels
- [Supply Chain Optimizer](https://devtools.surf/tools/supply-chain-optimizer/) - Optimize supply chain routes and reduce logistics costs
- [Logistics Cost Calculator](https://devtools.surf/tools/logistics-cost-calculator/) - Calculate logistics costs including shipping, handling, and storage
- [Warehouse Management Simulator](https://devtools.surf/tools/warehouse-management-simulator/) - Simulate warehouse operations and optimize storage utilization
- [RFQ Template Generator](https://devtools.surf/tools/rfq-template-generator/) - Generate request for quote templates for supplier negotiations
- [Vendor Risk Assessor](https://devtools.surf/tools/vendor-risk-assessor/) - Assess vendor risks and create risk management strategies
- [Procurement Analytics Dashboard](https://devtools.surf/tools/procurement-analytics-dashboard/) - Dashboard for analyzing procurement metrics and spending patterns
- [Cost-Benefit Analyzer](https://devtools.surf/tools/cost-benefit-analyzer/) - Analyze cost-benefit scenarios for business decisions
- [Market Analysis Generator](https://devtools.surf/tools/market-analysis-generator/) - Generate comprehensive market analysis reports and insights
- [Competitive Analysis Tool](https://devtools.surf/tools/competitive-analysis-tool/) - Analyze competitors and generate competitive advantage strategies
- [Business Metrics Dashboard](https://devtools.surf/tools/business-metrics-dashboard/) - Dashboard for tracking key business metrics and KPIs
- [Performance KPI Tracker](https://devtools.surf/tools/performance-kpi-tracker/) - Track and analyze performance KPIs with trend analysis
- [Sustainability Calculator](https://devtools.surf/tools/sustainability-calculator/) - Calculate sustainability metrics and environmental impact

## Pet Care

- [Pet Care Budget Calculator](https://devtools.surf/tools/pet-care-budget/) - Calculate monthly and annual pet care expenses
- [Pet Adoption Cost Calculator](https://devtools.surf/tools/pet-adoption-calculator/) - Estimate total cost of pet adoption and setup
- [Pet Food Calculator](https://devtools.surf/tools/pet-food-calculator/) - Calculate daily/monthly pet food needs and costs
- [Pet Health Tracker](https://devtools.surf/tools/pet-health-tracker/) - Track pet health records, medications, and visits
- [Pet Vaccination Scheduler](https://devtools.surf/tools/pet-vaccination-scheduler/) - Schedule and track pet vaccination dates
- [Pet Training Planner](https://devtools.surf/tools/pet-training-planner/) - Plan and track pet training programs and milestones
- [Pet Grooming Scheduler](https://devtools.surf/tools/pet-grooming-scheduler/) - Schedule pet grooming appointments and track maintenance
- [Pet Breed Comparison](https://devtools.surf/tools/pet-breed-comparison/) - Compare different pet breeds by characteristics and requirements
- [Veterinary Cost Estimator](https://devtools.surf/tools/veterinary-cost-estimator/) - Estimate veterinary service costs and procedures
- [Pet Insurance Calculator](https://devtools.surf/tools/pet-insurance-calculator/) - Calculate pet insurance costs and coverage options

## Optional

- [llms-full.txt](https://devtools.surf/llms-full.txt) - Expanded feed with deep-links into each tool's use cases, tips, and fun facts.
- [Sitemap](https://devtools.surf/sitemap.xml) - Every indexable page on the site.
- [Privacy policy](https://devtools.surf/privacy/) - What we collect and why.
- [Community feed](https://devtools.surf/feed/) - Shared tool runs and tips.
- [Themes](https://devtools.surf/themes/) - Cosmetic theme catalog.
- [Pricing](https://devtools.surf/payments/) - Credit packs and subscriptions.