Format JSON.Validate & Minify.
A powerful, privacy-focused JSON editor. Format, Diff, Fix. 100% Client-Side.
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Frequently Asked Questions
Everything you need to know about the tool.
Can I format invalid JSON?
We'll attempt to fix common errors (like trailing commas) automatically, but severe syntax errors will need manual correction.
Is my data private?
Absolutely. Your JSON never leaves this page. It is processed locally in JavaScript.
Private & Secure
Processing happens 100% in your browser. Files are never uploaded to any server.
Blazing Fast
Powered by WebAssembly for near-native performance. No waiting for uploads.
No Install
Works on any device (Windows, Mac, Chromebook, Mobile) directly in Chrome/Edge/Firefox.