JSON Formatter & Validator

Format, prettify and validate JSON online. Instantly beautify minified JSON with syntax highlighting.

Input JSON

Output

Formatted output will appear here

About this tool

Format, prettify and validate JSON online. Instantly beautify minified JSON with syntax highlighting. All processing happens directly in your browser — your files are never uploaded to any server, ensuring complete privacy.

✅ Free to use, no sign-up required
✅ Files never leave your device
✅ Instant conversion
✅ Works on any browser and device