JSON to Python Models

Generate Pydantic models, dataclasses, or TypedDict from JSON. Supports nested objects, arrays, and optional fields.

config.json

Generation Options

input.json
user.py

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Frequently asked questions

Paste your JSON into the editor. Choose output mode: Pydantic v2 models, dataclasses, or TypedDict. Configure class name and options. Python code generates instantly with type hints.

No. All Python model generation happens 100% client-side in your browser. Your data never leaves your machine.

Pydantic: runtime validation, serialization, best for APIs. Dataclass: simple data containers, stdlib only. TypedDict: type hints for dict structures, no runtime overhead.

Yes. Enable 'Use Optional' to wrap nullable fields in Optional[]. Pydantic mode also adds Field defaults for optional fields.

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