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JSON Formatter / Prettifier

JSON Validator

Validate your JSON syntax and structure. Get detailed error messages and formatted output for valid JSON.

How to Use JSON Validator

1

Paste Your JSON

Copy and paste your JSON data into the input area. The validator will check for syntax errors and structural issues.

2

Click Validate

Click the "Validate JSON" button to check your JSON for errors. The tool will highlight any issues found.

3

Review Results

Check the validation results. If valid, you can copy the formatted JSON. If invalid, fix the errors and try again.

Validation Features

  • ✓Syntax error detection with line numbers
  • ✓Missing comma and bracket detection
  • ✓Invalid character identification
  • ✓Quote and escape sequence validation
  • ✓Real-time validation as you type
  • ✓Detailed error messages and suggestions

Use Case Scenarios

API Testing

Validate API responses before processing to ensure data integrity.


{ "status": "success", "data": {...} }

Data Import

Validate JSON data before importing into databases or applications.


{ "users": [ {"id": 1, "name": "John"} ] }

Configuration Validation

Check configuration files before deployment to prevent runtime errors.


{ "database": { "host": "localhost", "port": 5432 } }

Code Review

Validate JSON in pull requests to catch errors before merging.


{ "error": { "code": 404, "message": "Not Found" } }

Common JSON Errors

❌

Missing Comma

{"name": "John" "age": 30}

❌

Unclosed Quotes

{"name": "John}

❌

Trailing Comma

{"name": "John",}

❌

Invalid Escape

{"path": "C:\folder"}