JSON Formatter & Validator

Format messy JSON, validate syntax, and make nested data easier to read. All processing happens in your browser — your data never leaves your device.

Input JSON

Auto-format

Formatted Output

Indent:

How to use this tool

JSON Formatter & Validator helps you work with JSON data:

Validate: Check if your JSON syntax is correct
Format: Pretty-print JSON with proper indentation for readability
Minify: Remove whitespace to reduce size for APIs and storage
Copy/Download: Use the formatted JSON in your projects

Privacy & Security

All JSON processing happens entirely in your browser using JavaScript. Your data is never sent to any server, uploaded, or stored. This tool works completely offline once loaded.

Example JSON

Try pasting this example to test the formatter:

          {"users":[{"id":1,"name":"Alice","email":"[email protected]","active":true},{"id":2,"name":"Bob","email":"[email protected]","active":false}],"timestamp":"2026-10-17T12:00:00Z","meta":{"version":"1.0","count":2}}