JSON Validator
Validate JSON syntax and get detailed, line-aware error messages.
Last updated
Enter some JSON and click Validate.
How the JSON Validator works
Validate JSON syntax and get detailed, line-aware error messages. No sign-up, no uploads — everything runs in your browser.
Frequently asked questions
What does "valid JSON" mean?
Valid JSON is text that conforms to the JSON specification and can be parsed into an object without errors.