🔒100% client-side — Your file stays on your device

JSON Formatter & Validator

Beautify, format, validate, and minify JSON strings online. 100% client-side with no data sent to any server.

Input JSON

Formatted Output

Frequently Asked Questions

Is it safe to format proprietary JSON data here?: Yes, 100%! All JSON parsing happens entirely inside your browser JavaScript engine. Zero data is logged or transmitted across any API network.
What happens if my JSON is invalid?: Our validator highlights the syntax error location so you can fix missing quotes or commas quickly.