JSON to Python Class Generator
Convert JSON data to Python dataclasses or Pydantic models with type hints, validation, and nested class support.
JSON Input
PY
Python Output
Try with sample JSON
Simple Object
Basic user data
Nested Object
Object with nested structures
Array of Objects
List of items
API Response
Typical REST API response
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All conversion happens locally in your browser. Your JSON data never leaves your device.
JSON to Python Class Generator
Our JSON to Python class generator converts JSON data into properly formatted Python code with full type hints. Choose between dataclasses, Pydantic models, or TypedDict for your specific use case.
Output Formats
- Dataclass - Python 3.7+ dataclasses with
@dataclassdecorator - Pydantic - Pydantic BaseModel classes with validation
- TypedDict - Type-safe dictionaries for static type checking
Features
- Type Inference - Automatically detects str, int, float, bool, list, and dict types
- Optional Types - Uses
Optional[T]for nullable fields - Nested Classes - Generates separate classes for nested objects
- Snake Case - Converts camelCase to Python's snake_case convention
- Default Values - Optional default value generation
When to Use Each Format
- Dataclass - General purpose, minimal dependencies, Python 3.7+
- Pydantic - API validation, FastAPI integration, runtime validation
- TypedDict - When you need dict behavior with type safety