JSON Formatter

What is a JSON Formatter?

A JSON formatter turns messy, single-line or inconsistent JSON into clean, indented, readable text — and flags syntax errors. Fontily's also validates and minifies JSON, all processed locally so your API responses, configs and logs never leave your browser.

Features

• Beautify JSON with proper indentation.
• Validate syntax with clear, specific error messages.
• Minify to a single line to shrink payloads.
• Private — everything runs locally.
• Free with no sign-up.

How to Use the JSON Formatter

1. Paste your JSON into the editor.
2. Beautify it to read and debug the structure.
3. Fix any errors the validator highlights.
4. Minify it when you need a compact version, then copy the result.

Benefits

Reading raw JSON from an API or log file is painful. A formatter makes nested structures instantly readable, catches missing commas and brackets before they break your code, and produces compact output for production — a daily time-saver for developers.

Use Cases

• Debugging API responses and webhooks.
• Cleaning up config files and fixtures.
• Validating JSON before deployment.
• Minifying JSON for smaller payloads.

Conclusion

Fontily's JSON Formatter beautifies, validates and minifies JSON instantly and privately. Paste your JSON above to read, fix and compress it in seconds — free and local.