About the JSON Validator
Validate JSON against the standard (RFC 8259). Errors are explained in plain language with the position, plus hints for common mistakes like trailing commas.
JSON Validator
Check whether JSON is valid and find the exact line and column of any syntax error.
- Paste your input
- Choose the options
- Copy the output
Runs in your browser. Your data and files never leave your device.
Frequently asked questions
Does it validate against a JSON Schema?
No — it checks that the JSON is well-formed. Schema validation checks the structure against rules you define.
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