How do I use the JSON Schema Validator?

Paste or type your JSON Schema in the left panel. Paste the JSON data you want to validate in the second text area. Click Validate to check the data against the schema. Review any errors listed with specific field names and expected types. Click Load Example to see a working schema and data pair. Check the Schema Properties panel for a quick overview of defined fields.

Is the JSON Schema Validator free?

Yes, the JSON Schema Validator is completely free. It runs entirely in your browser with no signup, no download, and no data sent to any server.

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JSON Schema Validator

Validate JSON data against a JSON Schema. Check types, required fields, patterns, min/max constraints, and nested objects with detailed error messages.

json schemajson validatorschema validationjson checkapi validationdata validationjson type check

JSON Schema JSON Data to Validate

Click "Validate" to check your JSON against the schema.

Schema Properties

Load a schema to see its properties.

Supported Types

string number integer boolean object array null

How to use

Validate JSON Data Against Any Schema

1 Paste or type your JSON Schema in the left panel.
2 Paste the JSON data you want to validate in the second text area.
3 Click Validate to check the data against the schema.
4 Review any errors listed with specific field names and expected types.
5 Click Load Example to see a working schema and data pair.
6 Check the Schema Properties panel for a quick overview of defined fields.

JSON Schema validation is essential for API development, configuration file checking, and data pipeline quality assurance. This tool validates your data right in the browser without sending anything to a server, keeping your data private.

The validator checks types, required fields, string patterns, numeric ranges, array constraints, and nested object structures. Error messages pinpoint exactly which field failed and why, making it fast to fix issues in your data or adjust your schema.

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