JSON Validator
Validate JSON syntax and see detailed error messages
How to Use JSON Validator
- Paste your JSON into the input field
- Validation happens automatically
- Valid JSON shows a green success message
- Invalid JSON shows the error location and description
About JSON Validator
Validate your JSON and find syntax errors instantly. Get detailed error messages showing exactly where problems are in your JSON. Perfect for debugging API responses, configuration files, or any JSON data. All validation happens locally in your browser.
Frequently Asked Questions
What errors does this catch?
All JSON syntax errors including missing quotes, trailing commas, invalid values, mismatched brackets, and incorrect escaping.
Does this fix my JSON automatically?
No, this only validates and reports errors. For formatting, use our JSON Formatter tool which also validates.
Why is my JSON invalid when it works in JavaScript?
JavaScript allows features that aren't valid JSON, like trailing commas, single quotes, unquoted keys, and comments. JSON is stricter.
Can I validate JSON Schema?
This tool validates JSON syntax only, not JSON Schema validation. Schema validation may be added in the future.