JSON Formatter & Validator
Pretty-print, minify and validate JSON. Nothing is stored or sent anywhere.
How it works
- Paste any JSON, valid or not.
- Click "Format" for readable, indented output, or "Minify" to strip all whitespace.
- Invalid JSON shows exactly where the problem is.
Uses the browser's native JSON parser, nothing is sent anywhere, even very large documents stay entirely on your device.