What happens if my JSON is invalid?

You'll see a clear error message describing the problem, rather than a broken or empty result.

Can I use this to minify JSON instead?

This tool focuses on formatting; for minifying, remove the whitespace using a text editor's find/replace or a dedicated minifier.

No hard limit — very large JSON documents may just take a moment longer to format.

Format, beautify, and indent minified JSON instantly.

Private by default Instant results No signup

1
Paste your JSON
Minified or inconsistently formatted JSON works.
2
Click Format JSON
Invalid JSON shows a clear error instead of a broken result.
3
Copy or download
Grab your nicely formatted JSON.

Processed locally

Your JSON never leaves your browser tab.

2-space indentation

Clean, readable, standard formatting.

Catches errors

Invalid JSON is reported clearly, not silently mangled.

Check JSON for syntax errors, with exact error location.

Format and indent XML documents.

Beautify messy HTML markup.

Beautify and indent CSS stylesheets.