JSON → Python

Generate Python dataclasses from a JSON sample.

Private by design. Your input never leaves this browser. Conversions run locally on your device.

What this tool handles

  • Emits @dataclass definitions with type hints, one class per nested object.
  • Keys that are not valid Python identifiers are skipped and listed in a comment.
  • Null values in the sample produce Optional fields.

Example

JSON sample

{"id":1,"name":"Ada","manager":null}

Python

from __future__ import annotations

from dataclasses import dataclass, field
from typing import Any, Optional

@dataclass
class Root:
    id: int
    name: str
    manager: Optional[Any] = None

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