JSON Formatter
Format, validate or minify JSON.
How to use
Choose or drop your file
Pick options and start
Download the result
About JSON Formatter
JSON Formatter beautifies messy JSON with proper indentation, validates it with clear error messages and can minify it again — ideal for APIs, config files and debugging.
- 100% free
- Files stay on your device
- No sign-up
- No watermark
- Works on mobile
Frequently asked questions
Does it show where the error is?
Yes, invalid JSON is reported with the error position.
Can it minify JSON?
Yes, with one click.
Is JSON Formatter free?
Yes. JSON Formatter is completely free, needs no account and never adds a watermark to your files.
Are my files safe?
Yes. Your file is processed inside your browser on your own device; it is never uploaded or stored.
Can I use it on my phone?
Yes. JSON Formatter works in every modern browser on iPhone and Android, no app needed.
Is it safe to use JSON Formatter online?
Yes. JSON Formatter processes your file on your own device, inside your browser. The file is never uploaded, stored or shared, and the connection is encrypted with HTTPS.
Does JSON Formatter work on iPhone or Android without an app?
Yes. It works in Safari, Chrome and every modern browser — no app, no account.