JSON Validator Online
Free online JSON validator that catches syntax errors before your API or runtime parses the payload.
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Free online JSON validator that catches syntax errors before your API or runtime parses the payload.
How it works
This tool attempts to parse your JSON using standard parsing rules. If parsing fails, it reports an invalid JSON result.
Example
Input:
{ "a": 1, }
Output:
Invalid JSONFAQ
What makes JSON invalid?
Common issues include trailing commas, unquoted keys, single quotes, and missing braces or brackets.
Does this validate against a schema?
No. This checks syntax validity; schema validation is a separate process.
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