Free Online JSON Formatter & Validator

Paste your JSON to format, validate, or minify it. Everything runs in your browser.

About JSON Formatter

This free online JSON formatter lets you format, validate, and minify JSON data instantly. All processing happens client-side in your browser — your data never leaves your device.

Features

Format JSON with proper indentation
Minify JSON to reduce size
Validate JSON syntax with clear error messages
Copy output to clipboard with one click