A fast, privacy-friendly JSON Formatter & Validator that runs entirely in your browser.
This tool helps developers format, validate, and beautify JSON instantly without uploading data to any server.
🔗 Live Tool: https://jstools.online/tools/json/json-beautifier/
🌐 All Developer Tools: https://jstools.online/
- Format & beautify JSON
- Instant syntax validation
- Client-side processing (no uploads)
- Works offline after load
- Free & no sign-up required
Most online tools send your data to a server.
This formatter runs 100% client-side, making it ideal for:
- Sensitive API responses
- Debugging large JSON payloads
- Quick formatting during development
- Debug API responses
- Clean up configuration files
- Validate JSON before deployment
- Learn JSON structure visually
- JavaScript Minifier – https://jstools.online/tools/javascript/minify-js/
- CSV to SQL Converter – https://jstools.online/tools/csv/csv-to-sql/
- HTML Minifier – https://jstools.online/tools/html/html-minify/
MIT License
You are free to use, share, and link to this tool.
⭐ If you find this useful, consider starring the repo!