Beautify minified JSON into readable, indented output - or minify it back.
About this tool
A JSON beautifier takes minified, single-line JSON and re-indents it into readable, structured output. Paste minified JSON to expand it, or compress formatted JSON back down - with validation and clear error messages, all running locally in your browser.
Frequently asked questions
What does a JSON beautifier do?
It takes minified JSON (everything on one line) and re-indents it so the structure is readable - objects, arrays, and nesting become visually clear.
Can I minify JSON too?
Yes - the same tool can compress formatted JSON back down to a single line, useful before pasting into code or URLs.
Is there a size limit?
No hard limit. Everything runs locally in your browser, so even multi-megabyte JSON files format instantly.