Format JSONValidate & Minify

A powerful, privacy-focused JSON editor. Format, Diff, Fix. 100% Client-Side.

Keep moving

Jump back to the broader workflow lane or open a tighter task entry page when this tool is only part of the job.

Move back to the broader developer workflow lane for logs, regex, and diffs.

Open the task-first entry when the current job is validating or comparing payload changes.

Everything you need to know about the tool.

We'll attempt to fix common errors (like trailing commas) automatically, but severe syntax errors will need manual correction.

Absolutely. Your JSON never leaves this page. It is processed locally in JavaScript.

Processing happens 100% in your browser. Files are never uploaded to any server.

Works on any device (Windows, Mac, Chromebook, Mobile) directly in Chrome/Edge/Firefox.