Which cases are supported?

camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, Train-Case, dot.case, path/case, and Title Case. All common naming conventions in software.

How does it detect word boundaries?

Three heuristics: existing separators (spaces, underscores, hyphens), lowercase-to-uppercase transitions (camelCase splits), and number boundaries. Works on arbitrary mixed input.

What about acronyms like HTTPServer?

Configurable. Default treats consecutive capitals as a single token (HTTPServer → http_server). Strict mode splits them (HTTPServer → h_t_t_p_server).

Does it preserve numbers?

Yes — numbers are treated as their own token. `user2name` becomes `user_2_name` in snake_case or `user2Name` in camelCase.

Case Converter | DevTools Surf

DevTools Surf

Example: Case Converter

A worked example, rendered from real sample data. Sign in to run the tool on your own input.

Input

the quick brown fox jumps over the lazy dog

Output

camelCase:       theQuickBrownFoxJumpsOverTheLazyDog
PascalCase:      TheQuickBrownFoxJumpsOverTheLazyDog
snake_case:      the_quick_brown_fox_jumps_over_the_lazy_dog
SCREAMING_SNAKE: THE_QUICK_BROWN_FOX_JUMPS_OVER_THE_LAZY_DOG
kebab-case:      the-quick-brown-fox-jumps-over-the-lazy-dog
Train-Case:      The-Quick-Brown-Fox-Jumps-Over-The-Lazy-Dog
dot.case:        the.quick.brown.fox.jumps.over.the.lazy.dog
path/case:       the/quick/brown/fox/jumps/over/the/lazy/dog
Title Case:      The Quick Brown Fox Jumps Over The Lazy Dog
Sentence case:   The quick brown fox jumps over the lazy dog
lower case:      the quick brown fox jumps over the lazy dog
UPPER CASE:      THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
aLtErNaTiNg:     ThE qUiCk BrOwN fOx JuMpS oVeR tHe LaZy DoG
iNVERSE cASE:    THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG

About Case Converter

Case Converter preview - Text / String tool

Convert between camelCase, snake_case, PascalCase, kebab-case, and more. Part of the DevTools Surf developer suite. Browse more tools in the Text / String collection.

Use Cases

Converting JavaScript camelCase variables to Python snake_case
Generating CSS class names from PascalCase component names
Transforming database column names for ORM field mapping
Creating URL-friendly slugs from title case headings

Tips

Convert variable names between language naming conventions
Switch between camelCase and snake_case for API field mapping
Use kebab-case output for CSS class names and URL slugs

Fun Facts

CamelCase was popularized by the Smalltalk programming language in the 1980s and later adopted by Java and JavaScript.
Snake_case gets its name from the underscore characters resembling a snake slithering between words.
PascalCase is named after the Pascal programming language (1970) by Niklaus Wirth, which used it for type identifiers.

FAQ

Which cases are supported?: camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, Train-Case, dot.case, path/case, and Title Case. All common naming conventions in software.
How does it detect word boundaries?: Three heuristics: existing separators (spaces, underscores, hyphens), lowercase-to-uppercase transitions (camelCase splits), and number boundaries. Works on arbitrary mixed input.
What about acronyms like HTTPServer?: Configurable. Default treats consecutive capitals as a single token (HTTPServer → http_server). Strict mode splits them (HTTPServer → h_t_t_p_server).
Does it preserve numbers?: Yes — numbers are treated as their own token. `user2name` becomes `user_2_name` in snake_case or `user2Name` in camelCase.

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