Developer Tools
JSON Validator
Check JSON syntax instantly with line and column error positions.
Paste or type JSON above. Validation happens automatically as you type.
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Frequently Asked Questions
- What does this tool validate?
- This tool validates JSON syntax only. It checks whether your input is well-formed JSON according to the ECMA-404 standard. It does not validate against JSON Schema.
- Is my data sent to a server?
- No. All validation happens locally in your browser using JSON.parse(). Your data never leaves your device.
- What error information is provided?
- When JSON is invalid, the tool shows the error message, approximate line number, and column position to help you locate the issue.
- Can it validate JSON Schema?
- No. This is a JSON syntax validator only. For JSON Schema validation, use a dedicated schema validation tool.