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JSON validator

Validate JSON syntax and locate errors by line and column. Does not validate JSON Schema and allows duplicate keys. Up to 1 million characters and 100 levels.

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Set your data

Validate JSON syntax and locate errors by line and column. Does not validate JSON Schema and allows duplicate keys. Up to 1 million characters and 100 levels.

Result

Enter your data and run the tool. Your result will appear here.

Data is processed only on this page and is not sent to the server. Reloading or navigating away clears it.

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Formula and instructions

JSON · RFC 8259

Validate JSON syntax and locate errors by line and column. Does not validate JSON Schema and allows duplicate keys. Up to 1 million characters and 100 levels.

Sources and further reading

Frequently asked questions

Which formula does this tool use?

JSON · RFC 8259 Validate JSON syntax and locate errors by line and column. Does not validate JSON Schema and allows duplicate keys. Up to 1 million characters and 100 levels.

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