JSON Schema Generator

Generate a JSON Schema from your JSON data. Infer types, nested objects, arrays, and required properties, then copy or download the schema.

Developer utilityDraft 2020-12Client-side

Input JSON

Paste a valid JSON object or array.

Schema title

Loading editor...

Mark properties as requiredProperties present in the input are marked required.Strict object validationAdd additionalProperties: false to generated objects.

Generated Schema

JSON Schema Draft 2020-12

Your schema will appear here

Enter JSON and click Generate JSON Schema to create the schema.

Automatic type detection

Detects strings, booleans, nulls, integers, decimals, and objects.

Nested data support

Generates schemas for nested objects and arrays, including arrays containing different types.

Export with ease

Copy the generated schema or download it as a JSON file.

How to use the JSON Schema Generator

Paste a representative JSON sample.
Set a schema title and choose validation options.
Click Generate JSON Schema.
Review the result, then copy or download it.

Note: inferred required fields and array item types depend on the sample provided. This tool generates a schema but does not validate the sample against the generated schema.