JSON Validator
Validate JSON syntax and see detailed error messages.
Frequently Asked Questions
What does JSON validation check?
It checks that your JSON follows the official RFC 8259 syntax: correct brackets, quoted keys, valid value types, and no trailing commas.
Will it tell me where the error is?
Yes — the validator shows the exact error message from the JavaScript engine, which usually includes the position of the syntax error.
Does it validate JSON Schema?
This tool validates JSON syntax only, not JSON Schema compliance. It checks whether the document is valid JSON, not whether it matches a schema.
Can I validate JSON with comments?
Standard JSON does not allow comments. If your file has // or /* */ comments (JSONC), you must remove them before validating.