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JSON Validator

Validate and format your JSON data instantly

100% Private: All processing happens in your browser. No data is sent to any server.
Enter JSON to validate

What is JSON Validator?

Our JSON Validator is a powerful online tool that helps developers validate JSON syntax and format JSON data instantly. Whether you are working with API responses, configuration files, or data structures, this tool ensures your JSON is correctly formatted and valid according to JSON standards.

How to Use

  1. Paste or type your JSON data into the input field
  2. The tool automatically validates your JSON in real-time
  3. If valid, you will see a formatted version with proper indentation
  4. If invalid, you will see the exact error message and location
  5. Copy the formatted output using the copy button

Common Use Cases

  • Validating API responses before processing
  • Debugging JSON configuration files
  • Formatting minified JSON for better readability
  • Checking JSON syntax errors in development
  • Verifying data structure integrity
  • Learning JSON syntax and best practices

Key Features

  • Real-time JSON validation
  • Automatic formatting with proper indentation
  • Clear error messages with line numbers
  • One-click copy to clipboard
  • Handles large JSON files efficiently

Why Use Our JSON Validator?

✅ 100% Client-Side Processing

All processing happens in your browser. Your data never leaves your device.

🚀 Fast & Instant

No server delays. Process your data instantly without waiting.

🔒 Completely Secure

No data sent to servers means no risk of data breaches or leaks.

💰 Free Forever

No registration, no limits, no hidden costs. Use as much as you need.