JSON Formatter & Validator
Format, minify and validate JSON with clear error messages showing the line and column of the problem.
- Free
- No sign-up
- Runs in your browser
- Web & Developer
About the JSON Formatter & Validator
Paste JSON to pretty-print or minify it. Invalid JSON shows exactly where the error is.
How it works
Uses the browser’s native JSON parser, so results match what your JavaScript will accept.
Frequently asked questions
Is my data sent to a server?
No — everything runs in your browser.