JSON Formatter

JSON

Format and beautify JSON with configurable indentation. Validates as you type and reports the exact error location.

Frequently asked

Is JSON Formatter free to use?

Yes. JSON Formatter is completely free, with no sign-up and no usage limits.

Does JSON Formatter upload my data?

No. JSON Formatter runs entirely in your browser — your input never leaves your device and nothing is stored on a server.

How does JSON Formatter work?

Format and beautify JSON with configurable indentation. Validates as you type and reports the exact error location.

Can I use JSON Formatter offline?

Once the page has loaded it works without a network connection, because all processing happens locally in your browser.