JSON Validator
Check JSON syntax and get clear parse error messages.
Paste JSON to verify that it parses. On success you get confirmation; on failure — a parser error message. This checks syntax only, not a schema or required fields.
Validation runs locally in the browser. Strict JSON: double quotes, no comments, no trailing commas.
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FAQ
No. Validation runs entirely in your browser. The tool does not upload the JSON.
No. The verification is performed locally in the browser and does not require downloading the document. Secret data should not be inserted into an untrusted or modified page anyway.