How the JSON formatter works
The tool parses input with the browser’s standard JSON parser. Valid documents are returned with indentation or without unnecessary whitespace; invalid input remains unchanged and produces an error.
When it is useful
Formatting makes API responses and configuration files easier to read. Minification reduces JSON size before transport or storage.
Local processing
Your JSON stays on your device. Formatting and validation run in browser JavaScript.
Frequently asked questions
Does formatting change JSON values?
No. Only whitespace and line breaks change. Types, keys, and values are preserved.
Can I validate JSON without formatting it?
Yes. Both operations validate the document first and produce no result when parsing fails.