Does it handle huge CSVs?

Streaming in the browser — tens of thousands of rows perform well. Millions of rows strain memory; for those use a streaming tool (DuckDB, csvkit).

Sortable and filterable?

Yes — click column header to sort, use the filter bar to narrow rows. Compound filters (AND across multiple columns) supported.

Yes — numeric columns sort numerically; date columns sort chronologically. Mixed-content columns fall back to string sort.

Read-only viewer. For editing use a spreadsheet (Excel, Google Sheets) or a CSV-editing tool.

CSV Viewer | DevTools Surf

DevTools Surf

Example: CSV Viewer

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

Input

name,email,age,city
Alice,alice@test.com,30,New York
Bob,bob@test.com,25,San Francisco
Charlie,charlie@test.com,35,Chicago
Diana,diana@test.com,28,Austin

Output

4 rows × 4 columns · "," delimited

name    | email            | age | city         
--------+------------------+-----+--------------
Alice   | alice@test.com   | 30  | New York     
Bob     | bob@test.com     | 25  | San Francisco
Charlie | charlie@test.com | 35  | Chicago      
Diana   | diana@test.com   | 28  | Austin       

Columns
  name   string · 4 distinct
  email  string · 4 distinct
  age    integer · min 25 · max 35 · mean 29.5 · 4 distinct
  city   string · 4 distinct

About CSV Viewer

View CSV data in a sortable, filterable table. Part of the DevTools Surf developer suite. Browse more tools in the Data / SQL collection.

Use Cases

Previewing exported database tables without opening Excel
Exploring API response data saved in CSV format
Quickly filtering large log files exported as CSV
Reviewing data migration files before importing into databases

Tips

Sort columns by clicking headers to explore data quickly
Filter rows to find specific entries in large datasets
Paste CSV directly from clipboard for instant table rendering

Fun Facts

CSV files have no official maximum size limit, but Excel can only open CSVs with up to 1,048,576 rows (the row limit since Excel 2007).
The CSV format predates personal computers; it was used in the 1960s and 1970s for data exchange between mainframe systems.
Despite its simplicity, CSV has no standard way to represent null values; empty fields, 'NULL,' and 'N/A' are all used interchangeably.

FAQ

Does it handle huge CSVs?: Streaming in the browser — tens of thousands of rows perform well. Millions of rows strain memory; for those use a streaming tool (DuckDB, csvkit).
Sortable and filterable?: Yes — click column header to sort, use the filter bar to narrow rows. Compound filters (AND across multiple columns) supported.
Does it infer types?: Yes — numeric columns sort numerically; date columns sort chronologically. Mixed-content columns fall back to string sort.
Can I edit?: Read-only viewer. For editing use a spreadsheet (Excel, Google Sheets) or a CSV-editing tool.

Related Data / SQL Tools

CSV → SQL INSERT SQL → CSV Fixture TSV ↔ CSV CSV Schema Validator SQL → Prisma Schema CSV Column Remapper CSV Validator with Schema SQL Identifier Caser