JSON Formatter & Validator
Beautify, validate, fix, and minify JSON payloads with syntax error detection.
About this tool
Clean up minified API responses and identify syntax bugs with instantaneous client-side validation.
How to use this tool
- Paste raw JSON
- Click Format JSON or Minify
- Copy clean formatted output
How it works
Parses input against ECMAScript JSON specifications, highlighting precise character offsets on errors.
When to use this tool
- Debugging backend REST responses
- Inspecting configuration files
Frequently asked questions
Is my JSON sent to a server?
No. The text is parsed in your browser and is not sent to us.
How does it report syntax errors?
The parser points at the line and column of the first problem it finds, so you can go straight to the broken part of the payload.
Can it repair broken JSON?
It can correct common mistakes such as trailing commas and single quotes. It cannot recover a payload whose brackets or quotes are genuinely missing.
Limitations
Payloads up to 20MB supported smoothly.
Privacy
The payload stays in your browser and is not sent to us.