JSON Formatter
Paste JSON on the left — formatted, highlighted output appears instantly on the right. Supports indent styles, minify, sort keys, and precise inline error display. Your data never leaves your device.
Indent:
Paste JSON to get started
Cmd/Ctrl+Shift+F to reformat
Output will appear here
Frequently Asked Questions
- Can it format and validate JSON at the same time?
- Yes. JSON Formatter validates as you type and shows errors inline. Valid JSON is formatted and syntax-highlighted automatically.
- Can I minify JSON to reduce size?
- Yes. Switch to Minify mode to remove all whitespace and produce compact single-line JSON.
- Is this tool free to use?
- Yes, completely free. No account, no subscription, no hidden limits.
- Are my files safe? Do you upload them?
- Your files never leave your device. All processing runs locally in your browser using JavaScript — nothing is sent to any server.
- Does it work on mobile?
- Yes, it works on all modern browsers including mobile Safari and Chrome on iOS and Android.