JSON to Python Dataclass Generator

Generate Python dataclasses or TypedDicts from JSON data.

Output style:dataclassTypedDict

JSON Input

Python Output

from __future__ import annotations
from dataclasses import dataclass
from typing import List, Optional

@dataclass
class Root:
    name: str
    age: int
    email: Optional[str]
    scores: List[int]
    address: Address

@dataclass
class Address:
    city: str
    zip: str

Python dataclasses (introduced in Python 3.7) provide a concise way to define data structures with type annotations, automatic __init__, __repr__, and comparison methods. TypedDict provides dictionary typing without the class overhead. This generator creates production-ready Python type definitions from JSON data, handling optional fields, nested objects, and lists.

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Frequently Asked Questions

: It generates Python dataclasses (Python 3.7+) with proper type annotations. Nested objects become separate dataclasses.