Instant

JSON Formatter

Validate, pretty-print, and minify JSON instantly. Free, private, runs in your browser.

Indent

FAQ

What does it do?

It validates, pretty-prints, and minifies JSON. Errors are shown with a clear message so you can fix them fast.

Is my JSON sent anywhere?

No. All parsing happens in your browser. Nothing is uploaded.

Can it handle large files?

Yes, as large as your browser memory allows.