What does JSON → Python actually do?

JSON to Python sketches dataclasses or typed dict-style fields from a sample. Numbers become float or int based on the sample token. Optional keys that were present in the sample look required. It does not run Python.

When should I use JSON → Python?

Use it to start a typed model from a fixture.

When should I not use JSON → Python?

Do not assume every numeric field is int.

What does JSON → Python not do?

One sample, one shape. Does not import dataclasses into an interpreter here.

JSON → Python

Generate Python @dataclass classes from JSON. Type hints, snake_case keys, nested classes. Free online — runs locally, no upload.

Root class name

@dataclassType hints__slots__

JSON Input

Python Output

Generates Python @dataclass classes with type hints. camelCase keys become snake_case (Python convention). Nested objects become nested classes. Lists use list[T] generic syntax.

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JSON → Python