Which JSON Schema draft is generated?

The tool generates JSON Schema draft-07, which is widely supported by validators such as Ajv, jsonschema (Python), and most OpenAPI tooling.

How are types inferred?

Each value is inspected at runtime: strings map to 'string', numbers to 'number' or 'integer', booleans to 'boolean', null to 'null', arrays to 'array' with items inferred from the first element, and objects recurse to produce nested schemas.

Can I mark all fields as required?

Yes — toggle the 'Make all fields required' option to add a 'required' array containing every key to each object schema in the output.

Does it handle nested objects and arrays?

Yes. The schema generator recurses into nested objects and arrays, producing accurate nested schemas with proper $schema and type annotations at every level.

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JSON Schema Generator

Generate JSON Schema (draft-07) automatically from a sample JSON object.

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关于此工具

Paste any JSON object or array and instantly generate a JSON Schema (draft-07) with full type inference for strings, numbers, booleans, nulls, nested objects, and arrays. Toggle options to mark all fields as required, add auto-generated descriptions, or infer string formats such as date-time and URI. The output schema is formatted and ready to copy or download for use in validation libraries, API documentation, or code generation tools.

使用方法

1 Paste your sample JSON into the input editor.
2 Toggle 'Make all fields required' or 'Add descriptions' as needed.
3 Click 'Generate Schema' to produce the JSON Schema.
4 Review the output in the schema editor panel.
5 Click 'Copy Schema' to copy it to your clipboard.

关于此工具

使用方法

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