JSON Formatter & Validator
Paste minified or messy JSON and get a clean, indented, easy-to-read version — with instant validation errors if something's wrong.
Valid JSON ✓
How to use the JSON Formatter & Validator
- Paste your JSON into the input box.
- Click Format to beautify it, or Minify to compress it.
- Validation errors, if any, appear immediately below the input.
Frequently asked questions
Does this validate JSON syntax?
Yes. If your JSON is invalid, an error message shows exactly what's wrong so you can fix it quickly.
Can I minify JSON too?
Yes, use the Minify button to compress JSON to a single line by removing all unnecessary whitespace.
Is my JSON data uploaded anywhere?
No. Formatting and validation happen entirely in your browser — nothing is sent to a server.