JSON Validator client-side ?
How to use JSON ValidatorThe JSON validator checks that a document follows JSON syntax and tells you exactly which line and character caused an error. Trailing commas, missing quotes, unclosed braces: the tool catches these in milliseconds, sparing you from scanning a whole file by hand. It's the ideal check before sending a request, committing a config file, or wiring up an API response.
Validation happens locally in your browser. Your data never leaves your machine, so you can check confidential payloads with no risk of leaking anything.
?
The JSON validator checks that a document follows JSON syntax and tells you exactly which line and character caused an error. Trailing commas, missing quotes, unclosed braces: the tool catches these in milliseconds, sparing you from scanning a whole file by hand. It's the ideal check before sending a request, committing a config file, or wiring up an API response. Validation happens locally in your browser. Your data never leaves your machine, so you can check confidential payloads with no risk of leaking anything.
Check whether your JSON is syntactically valid.
How to use JSON Validator
The JSON validator checks that a document follows JSON syntax and tells you exactly which line and character caused an error. Trailing commas, missing quotes, unclosed braces: the tool catches these in milliseconds, sparing you from scanning a whole file by hand. It's the ideal check before sending a request, committing a config file, or wiring up an API response. Validation happens locally in your browser. Your data never leaves your machine, so you can check confidential payloads with no risk of leaking anything.
Frequently asked questions
What exactly does the validator check?
It verifies JSON syntax: object and array structure, quoting, commas, and the allowed value types.
Where is the error reported?
The tool shows the approximate position (line and column) of the first problem it finds so you can fix it quickly.
Is my data transmitted anywhere?
No. Validation runs entirely in your browser and nothing is uploaded.
Are comments allowed?
No, because standard JSON does not permit comments. They will be reported as a syntax error.