Format & validate JSON.

Paste JSON to beautify, validate, or minify it. Invalid JSON gets the exact line and position of the first error, so you stop hunting for the stray comma. Everything runs in your browser.

Find the comma, not your patience

JSON is everywhere — config files, API responses, log lines — and a single trailing comma or smart-quote breaks the whole parse with an error that often points nowhere useful. A formatter does two jobs at once: it makes nested structure readable, and it tells you precisely where the syntax breaks. Beautify while you debug, minify before you ship, and never eyeball-match braces again.