DEVELOPER TOOL / 94
Validate the payload.
Find the break quickly.
Paste JSON to check whether it parses, see the browser's error message, and copy a formatted version. The payload stays in this tab.
JSON validator
JSON input
Result
A valid parse only confirms that the text is syntactically valid JSON. It does not confirm that an API's schema, required fields, or business rules are correct.
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QUICK ANSWERS
Does this send JSON to a server?
No. JSON.parse runs in the browser, which makes this suitable for checking private fixtures and API payloads before sharing them.
What does a JSON parse error mean?
It usually points to a missing comma, quote, bracket, or another character that prevents the text from following JSON syntax.