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JSON Validator
Validate and format your JSON data with detailed error reporting
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Free Online Tool
JSON Validator & Formatter
Validate, format, and beautify your JSON data instantly. Free online tool with error detection and line-by-line highlighting.
✓ Real-time Validation✓ Error Highlighting✓ Auto Format✓ Free Forever
Key Features
Instant Validation
Get immediate feedback on your JSON syntax with real-time error detection.
Error Highlighting
See exactly where errors occur with line-by-line highlighting and detailed messages.
Auto Formatting
Beautify your JSON with customizable indentation (2, 4, or 8 spaces).
Statistics
View detailed stats including lines, size, type, and structure information.
How to Use
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Paste JSON
Copy your JSON data and paste it into the editor
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Click Validate
Press the validate button to check syntax
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View Results
See validation results and error details
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Copy Formatted
Copy the beautified JSON with one click