json validator
paste json to check whether it is valid and see where the first error is.
runs on your device · free · no sign-up
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frequently asked questions
what does the validator check?
it checks strict json syntax: quoted keys, no trailing commas, no comments and valid values, exactly like JSON.parse.
does it validate against a schema?
no, it checks syntax only. valid output also shows the root type, nesting depth and value count.
is my data uploaded?
no. validation runs entirely in your browser.