Format, minify, and validate JSON data online. Free, fast, works in your browser.

What is JSON Formatter?

JSON Formatter is a free online tool that helps you format, minify, and validate JSON data. It runs entirely in your browser — your data never leaves your device.

Features

Format — Pretty-print JSON with proper indentation
Minify — Compress JSON by removing whitespace
Validate — Check if your JSON is valid and see error details
Copy — One-click copy to clipboard
Privacy — All processing happens client-side