JSON Schema Builder

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InputJSON Schema

Maximum text: 2 MB. One operation at a time; 90-second timeout.

Infer from example / Validate JSON

Inference describes this example, not every possible document. Review required and optional fields before using the schema.

Declared draft-07 subset: types, properties, arrays, local refs, enum/const, ranges and combinations. Remote refs, regex, format and other unsupported keywords are blocked.

Reports can contain private text or headers. Review before sharing.

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How to use JSON Schema Builder

Paste text

Add the text you want to transform.

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The transformation happens in your browser.

Copy or download

Copy the result or save it as a text file.

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