JSON Validator
Validate JSON syntax and structure
Input JSON
Paste your JSON to validate
Check whether your JSON data is valid and syntactically correct. Paste any JSON and get instant validation with detailed error messages pointing to the exact line and character where problems occur. Catches missing commas, unmatched brackets, trailing commas, and other common JSON errors.
Key Features
- ✓Instant JSON syntax validation
- ✓Precise error location (line and column)
- ✓Descriptive error messages
- ✓Validates against JSON specification
- ✓Green checkmark for valid JSON
How to JSON Validator Online
- 1
Paste JSON
Enter JSON to validate.
- 2
View validation result
Valid JSON shows a success message. Invalid JSON shows the error location.
- 3
Fix and re-validate
Correct the error and re-paste to confirm the fix.
Common Use Cases
- •Validating API request/response bodies
- •Checking JSON configuration files before deployment
- •Debugging malformed JSON from external sources
- •Verifying JSON exports from databases
Frequently Asked Questions
Does it check JSON Schema?▼
This tool validates JSON syntax (is it valid JSON?), not JSON Schema compliance. For schema validation, a dedicated tool is needed.
Are trailing commas allowed?▼
No. Trailing commas are not valid in JSON specification. This tool will flag them as errors.