What Python version is required?

The generated code uses dataclasses (Python 3.7+) and built-in type hints syntax. For Python 3.9+ the List and Optional imports from typing are still included for compatibility.

How are null fields typed?

JSON null values produce an Optional type annotation, e.g., `field: Optional[str] = None`.

Are nested objects supported?

Yes. Each nested JSON object generates a separate dataclass, defined before the class that references it to satisfy Python forward-reference rules.

JSON to Python Class

Convert JSON to Python dataclasses with type hints.

$json input

lines

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$python dataclass[READY]

lines

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FAQ

What Python version is required?: The generated code uses dataclasses (Python 3.7+) and built-in type hints syntax. For Python 3.9+ the List and Optional imports from typing are still included for compatibility.
How are null fields typed?: JSON null values produce an Optional type annotation, e.g., `field: Optional[str] = None`.
Are nested objects supported?: Yes. Each nested JSON object generates a separate dataclass, defined before the class that references it to satisfy Python forward-reference rules.

Paste a JSON object and generate Python dataclass definitions with full type hints. Imports from the dataclasses module are included automatically, nested objects become separate dataclasses, and types are inferred as str, int, float, bool, None, List, and Optional.