In-browser tool

JSON formatter & validator

Beautify or minify JSON and catch errors — right in your browser.

Everything runs in your browser — your input is never uploaded.

How it works

Type or paste your input

Get the result instantly

Copy the result

Does it validate JSON?

Yes — invalid JSON shows an error instead of output. Everything runs locally; nothing is uploaded.

Is my file uploaded to a server?

No. This tool runs entirely in your browser. You can open your browser's network tab and verify no request carries your file.