What does the JSON validator check?

It checks that the input conforms to the JSON specification (RFC 8259): proper quoting of keys, valid value types, correct nesting of objects and arrays, and no trailing commas.

Can it fix invalid JSON?

The validator identifies errors but does not auto-fix them. The error message tells you what is wrong and approximately where, so you can fix it manually.

Does it validate JSON Schema?

No. This tool validates JSON syntax only, not schema compliance. It checks that the input is parseable JSON, not that it matches a particular structure.

JSON Validator

Check if your JSON is valid and find syntax errors.

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FAQ

What does the JSON validator check?: It checks that the input conforms to the JSON specification (RFC 8259): proper quoting of keys, valid value types, correct nesting of objects and arrays, and no trailing commas.
Can it fix invalid JSON?: The validator identifies errors but does not auto-fix them. The error message tells you what is wrong and approximately where, so you can fix it manually.
Does it validate JSON Schema?: No. This tool validates JSON syntax only, not schema compliance. It checks that the input is parseable JSON, not that it matches a particular structure.

The JSON Validator parses your input and reports whether it is valid JSON. If there are syntax errors, it shows the exact error message with location information. Useful for quickly verifying JSON from API responses, configuration files, and data exports before using them.