{ } JSON Formatter
Paste messy JSON, get it pretty, validated and minified – with the exact error position when it's broken.
🔒 Runs in your browser · files never uploaded
How to use the JSON Formatter tool
- Paste JSON (or drop a .json file).
- Click Format, Minify or Validate.
- Copy the result or download.
Frequently asked questions
Is it safe to paste API responses with secrets?
Yes. The formatter runs 100% client-side; nothing is transmitted or logged.
Why does it say "Unexpected token"?
Common causes: trailing commas, single quotes instead of double, unquoted keys, or comments. The error message shows the line and column.
How big a file can it handle?
Tens of MB comfortably in a desktop browser.