Web Tools
JSON to Python
Convert JSON data to Python dict literals, @dataclass, or TypedDict definitions with type annotations. Infer nested classes, arrays, Optional types, and imports. Runs entirely in your browser — your data never leaves your machine.
json python converter dataclass typeddict code-generator
Published May 29, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Paste any JSON data and instantly get Python code in one of three output modes: dict literal, @dataclass, or TypedDict. The tool infers types from values, handles nested objects, arrays, null (Optional), and mixed types. Configure the root class name and Optional behavior.
Features
- 3 output modes: dict literal, @dataclass with decorators, TypedDict with inheritance
- Accurate type mapping: str, int, float, bool, None, Optional, Any, list
- Nested class inference: objects within objects generate separate named classes
- Array handling: homogeneous arrays get typed elements, mixed arrays use list[Any]
- Optional support: null values become Optional[type] in dataclass/typeddict modes
- Correct imports: auto-generates from dataclasses/typing imports as needed
- Python conventions: True/False/None, proper indentation
- 5 example payloads: simple, nested, array, API response, config file
- Private: runs entirely in the browser — no data transmitted
Use Cases
- Quickly generating Python dataclasses for API response data
- Bootstrapping Python types from JSON fixtures or API documentation
- Converting JSON config files to typed Python configurations
- Learning how JSON structures map to Python types