JSON Formatter
Format, indent and inspect JSON with clear error reporting.
JSON
JSON
Runs offline
JSON Validator
Check whether JSON is valid and see exactly where it breaks.
Input
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Questions
What does the validator report for a valid document?
It confirms validity and summarises the structure: the root type, how many keys or elements it holds, the maximum nesting depth, and the total size. That summary is often enough to spot a response that parsed but is not shaped the way you expected.
Does this validate against a JSON Schema?
No, this tool checks syntax only, against the JSON grammar in RFC 8259. It tells you whether the text is parseable JSON, not whether it matches a particular schema.
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