JSON Validator

Checks whether the given text is valid JSON, and explains what's wrong if it isn't.

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Checks whether the given text is valid JSON, and explains what's wrong if it isn't.

Use cases

  • Confirming an API response or config file is well-formed JSON
  • Diagnosing exactly where a JSON parse error occurs

Examples

Valid JSON

{"a": 1}
{"valid": true, "error": null}

FAQ

Is my data sent to a server?

Yes — validation runs on the server, since it uses Python's JSON parser for precise error messages.

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