Online JSON Editor, Formatter & Validator

Paste JSON to pretty-print, validate and fix it. Your data never leaves your browser, so it is safe for API keys and customer payloads.

What you can do

• Pretty-print and minify
• Validation with error locations
• Syntax highlighting
• No upload — fully local

Private by design

GenZ Editor runs entirely in your browser. Your files are processed on your own device and are never uploaded unless you choose to create a share link. No account, no watermark, no limits.

Frequently asked questions

Is it safe for sensitive JSON?

Yes. Nothing is sent to a server.

Can it validate JSON?

Yes, errors are shown with their position.

Is it free?

Yes.