Can it generate Pydantic models?

Replace @dataclass with inheriting BaseModel and the generated class becomes a Pydantic model — the type annotations are fully compatible.

How are null fields handled?

They are marked Optional[Any]; refine them to concrete types like Optional[str] based on the documentation.

JSON to Python

Free online JSON to Python converter: generate @dataclass models with type hints, snake_case names and Optional fields.

Privacy: all processing happens locally in your browser. Your input never leaves your device.

What is JSON to Python?

Modeling API data with dataclasses or Pydantic makes Python code far more maintainable. This tool generates standard-library @dataclass classes from a sample JSON: keys are converted to snake_case, type annotations are complete (str/int/float/bool/List/Optional), and nested objects become separate classes. The output works in Python 3.7+ projects.

How to Use

Paste a sample JSON
Python dataclasses are generated automatically
Copy into your project

FAQ

Can it generate Pydantic models?: Replace @dataclass with inheriting BaseModel and the generated class becomes a Pydantic model — the type annotations are fully compatible.
How are null fields handled?: They are marked Optional[Any]; refine them to concrete types like Optional[str] based on the documentation.

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Last updated 2026-09-04