JSON Formatter & Validator
Paste JSON to pretty-print it with proper indentation, minify it for production, or validate it and see exactly where the error is.
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How to use JSON Formatter & Validator
- Paste your JSON into the input box.
- Click Format to beautify, or Minify to compress.
- Errors are shown with a clear message if the JSON is invalid.
Frequently asked questions
What happens if my JSON is invalid?
The validator shows the exact parse error message from the JavaScript engine so you can find and fix the mistake quickly.
Is this tool free to use?
Yes. JSON Formatter & Validator is completely free with no sign-up, no watermarks, and no usage limits.
Are my files or data uploaded to a server?
No. Everything is processed locally in your browser using JavaScript. Your files and text never leave your device, which makes this one of the most private ways to get the job done.
Does it work on mobile?
Yes. The tool is fully responsive and works on Android, iPhone, tablets, and desktop browsers.