JSON to Python Converter
ConvertersGenerate Python dataclasses from a JSON object instantly in your browser. Powered by quicktype-core. Ruff-formatted output. UML class diagram view. Client-side.
JSON →
Python
JSONjson
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Pythonpython
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Input: 315 chars
About JSON to Python Converter
The JSON to Python converter uses `quicktype-core` with Python 3.7 target and Pythonic property names to generate typed Python dataclasses and type aliases. A post-processing step strips runtime helper functions, keeping only clean class definitions and a `from_dict` utility. Output is formatted with Ruff (Black-compatible) via WASM. The UML class diagram panel shows the inferred type hierarchy.
Features
- ✓Powered by quicktype-core targeting Python 3.7+
- ✓Generates typed dataclasses with proper type annotations
- ✓Property names converted to Pythonic snake_case
- ✓Post-processed to remove boilerplate — keeps only class definitions and from_dict
- ✓Formatted with Ruff (Black-compatible) via WASM
- ✓UML class diagram view shows the inferred type hierarchy
- ✓Handles nested objects → nested dataclasses
- ✓Handles arrays → List[T] type annotations
- ✓Optional fields use Optional[T] from typing
- ✓Download generated Python as a .py file
- ✓Copy output to clipboard in one click
- ✓Web Worker processing — never blocks the UI
- ✓100% client-side — data never leaves your browser
Common Use Cases
- Generating Python dataclasses from JSON API responses for typed deserialisation
- Creating Python model classes from JSON configuration files
- Scaffolding Python data schemas from JSON database exports
- Reverse-engineering JSON payloads to Python types for FastAPI or Pydantic
Frequently Asked Questions
QIs the output compatible with Pydantic?
The output uses Python dataclasses. Adapting it to Pydantic BaseModel requires changing the base class and removing the @dataclass decorator.
QWhat Python version is targeted?
Python 3.7+, using the typing module for List, Optional, and Union types.
QIs my data sent to a server?
No. quicktype-core and Ruff WASM run in a Web Worker inside your browser.