JSON Formatter - Free Online JSON Beautifier & Validator

Paste your JSON below to format, beautify, validate, and minify instantly.
QuickJSON helps developers debug and visualize JSON data right in the browser.

Try our free online JSON formatter — no signup, no ads, no limits.

Input JSON
Output JSON
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What is a JSON Formatter?

A JSON Formatter is a free online tool that helps you format, beautify, and validate JSON (JavaScript Object Notation) data. Developers often use JSON for APIs, configurations, and data exchange. However, raw JSON can be hard to read — this tool makes it easy to visualize and debug your JSON structures.

Why Use QuickJSON?

  • No signup required – 100% free and browser-based.
  • Secure – your data never leaves your device.
  • Supports JSON validation, minifying, and syntax highlighting.
  • Built for developers – clean UI, dark mode, and instant results.

How to Format JSON Online?

  1. Paste your JSON in the editor above.
  2. Click “Format” or use the keyboard shortcut.
  3. View beautified JSON with indentation and syntax colors.
  4. Validate your JSON to check for errors or invalid syntax.

Other Free JSON Tools

Besides formatting, you can try our other developer tools like JSON Minifier, JSON Validator, and JSON Viewer.

Frequently Asked Questions

Is QuickJSON free to use?

Yes, QuickJSON is completely free. You can format, validate, and beautify JSON without signing up or uploading data.

Does it store my JSON?

No. All operations are done locally in your browser for privacy and security.

What browsers are supported?

QuickJSON works on all modern browsers including Chrome, Firefox, Safari, and Edge.

Last updated: November 2025