JSON Formatter & Validator Pro

Format and validate JSON code with comprehensive syntax highlighting, error detection, and beautification capabilities for ensuring JSON validity. This development tool provides real-time validation, collapsible structures, search functionality, and export options with professional presentation. Essential for API development, data validation, debugging JSON responses, and ensuring proper JSON formatting in applications that require reliable data structure validation and presentation.
Real-time Validation Collapsible Structure Search Functionality Export Options
Quick Examples 
VALID: {"status": "success", "data": []}
FORMATTED: {
  "name": "John",
  "age": 30
}
ERROR: Unexpected token at line 3
JSON Editor
Ready Line 1, Column 1 Auto-saved
Lines: 0, Size: 0 B
Validation
Enter JSON to validate
Quick Actions
JSON Statistics
-
Type
0
Size
0
Keys
0
Depth
JSON Tree View
Node Details

Select a node to view details

Convert To
Converted Output
Auto-Fix JSON Errors
How to use: Click "Analyze Issues" to detect JSON problems. You can then fix individual issues or repair all problems at once.
Detected Issues

Click "Analyze Issues" to detect JSON problems...

Fix Options
Preview

Help & Related Tools

Everything you need to know

FAQ Frequently Asked Questions

What's the difference between formatting and validation?
Formatting improves JSON readability with proper indentation and spacing, while validation checks for syntax errors, missing brackets, or invalid structures. Both features work together to ensure clean, correct JSON.
Can the tool fix broken JSON automatically?
The validator identifies and highlights syntax errors with specific error messages, but it cannot automatically fix them. You'll need to manually correct issues like missing commas, unclosed brackets, or invalid characters.
Does it support large JSON files?
Yes, the tool can handle large JSON files efficiently, though very large files (several megabytes) may take time to process and could impact browser performance depending on your device capabilities.
Can I collapse sections of formatted JSON?
Yes, the formatted output includes collapsible sections for objects and arrays, making it easy to navigate through large, complex JSON structures and focus on specific data sections.
Is this useful for API development and debugging?
Extremely useful! The tool is perfect for formatting API responses, validating JSON payloads, debugging data structures, and ensuring your JSON meets specification requirements before implementation.

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