JSON Validator

Validate your JSON data instantly. Check for syntax errors, get detailed error messages, and ensure your JSON is properly formatted.

JSON Input

Valid JSON!

Your JSON is valid and properly formatted.

Invalid JSON

About JSON Validation

JSON validation ensures that your JSON data conforms to the JSON specification. Common validation checks include:

Valid JSON

Properly quoted strings
Correctly nested objects and arrays
Valid data types
Proper use of commas
No trailing commas

Common Errors

Missing or extra commas
Unquoted keys or strings
Single quotes instead of double quotes
Trailing commas
Invalid characters or escape sequences

JSON Best Practices

Use Double Quotes: JSON requires double quotes for strings, not single quotes
No Trailing Commas: Remove commas after the last item in objects or arrays
Escape Special Characters: Properly escape backslashes, quotes, and control characters
Valid Numbers: Don't use leading zeros or invalid number formats
No Comments: JSON doesn't support comments (unlike JavaScript)