JSON Validator
Validate JSON syntax instantly with detailed error reporting. Free online JSON validator with line and column error tracking.
Detailed Error Reporting
Shows exact line and column where syntax errors occur.
Instant Validation
Real-time syntax checking with helpful error messages.
Format on Validate
Optionally format valid JSON for better readability.
How to use
- Paste or type JSON into the JSON Input area.
- Click Validate to check syntax.
- If valid, a success message will appear.
- If invalid, error details will show the exact location.
- Use Validate & Format to format valid JSON.
FAQ
- What makes JSON valid?
- Valid JSON must follow strict rules: quoted property names, proper comma usage, matching brackets, and valid data types.
- What are common JSON errors?
- Missing or extra commas, unquoted keys, trailing commas, single quotes instead of double quotes, unclosed brackets.
- Can this validator fix my JSON?
- No, but it shows you exactly where the error is so you can fix it manually.