JSON & CSV Formatter

This free online JSON and CSV formatter lets you format, minify, validate, and convert data instantly. No downloads, no registration — just paste your data and go.

Paste your raw JSON or CSV data into the box below. Use the buttons to format, minify, validate, or convert your content.

Input

Output

How to use

Paste your JSON or CSV data into the input box.
Choose a function: Format to make it readable, Minify to compress it, Validate to check for errors, or CSV to JSON to convert.
Copy the result to your clipboard or download it as a file.

All processing happens locally in your browser — your data never leaves your device.

Features

Pretty-print nested JSON with proper indentation
Minify JSON to a single line for production use
Validate JSON syntax with clear error messages
Format and align CSV columns for readability
Convert CSV to JSON arrays (handles quoted fields and special characters)
Works offline after page load — no server uploads