CardBox Tools

JSON Formatter & Validator

Format, validate, and beautify JSON data instantly. Perfect for developers debugging APIs, working with large JSON files, and ensuring data structure integrity.

✓ Real-Time Validation

Validate JSON syntax instantly and get clear error messages for debugging.

🎨 Syntax Highlighting

Color-coded syntax makes JSON structure easy to read and understand.

🔧 Multiple Options

Format, minify, or compact JSON with customizable indentation levels.

JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting.

Input JSON

Output

Formatted output will appear here

Common Use Cases

API Development

Validate and format JSON responses from APIs. Debug malformed JSON data quickly and efficiently.

  • ✓ REST API debugging
  • ✓ Response validation
  • ✓ Error identification
  • ✓ Data transformation

Data Processing

Format large JSON files for better readability. Minify for optimized file size and transfer.

  • ✓ Large file handling
  • ✓ Minification
  • ✓ File optimization
  • ✓ Data cleaning

Frequently Asked Questions

How do I validate JSON?

Paste your JSON into the editor. The formatter automatically validates syntax and highlights errors in red.

What does minify do?

Minify removes all unnecessary whitespace and newlines, reducing file size significantly.

Can I edit the formatted JSON?

Yes, the editor is fully interactive. Make changes and validation updates in real-time.