JSON Validator
Validate JSON syntax and structure with detailed error messages.
What does JSON Validator do?
JSON Validator checks your JSON data for syntax errors and provides detailed error messages with exact line numbers. It validates against the official JSON specification and handles all JSON data types.
Use Cases
- •Debug malformed JSON from API responses
- •Validate JSON configuration files before deployment
- •Check JSON data before importing into databases
- •Verify JSON syntax in CI/CD pipelines
- •Validate JSON schemas and payloads
How to Use
- 1Paste your JSON data into the input panel
- 2Click "Validate" to check for syntax errors
- 3Review the result — valid JSON shows a green checkmark
- 4Invalid JSON shows the error message and line number
Frequently Asked Questions
What JSON errors does it detect?
It detects missing commas, trailing commas, unclosed brackets, unquoted keys, invalid values, and all other JSON syntax errors.
Does it validate JSON structure/schema?
It validates JSON syntax only (ensuring it is parseable). For schema validation, use a dedicated JSON Schema validator.
Is my data stored anywhere?
No. All validation happens entirely in your browser. Your data never leaves your device.