JSON Formatter

Paste messy JSON to pretty-print it with proper indentation, or minify it to a single line. Invalid JSON is flagged with the exact error.

How to use

1. Paste your JSON.
2. Choose an indent size.
3. Click Format or Minify.

Frequently asked questions

Does it validate JSON?

Yes — if the JSON is invalid, the precise parse error is shown.

Is my data safe?

Yes. Formatting happens in your browser; nothing is sent to a server.

Related tools