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JSON to Python Pydantic Model Converter
Convert JSON payloads into clean PEP8 Python Pydantic BaseModel declarations automatically.
Input JSON
Python Pydantic Models
What is JSON to Pydantic Converter?
Pydantic is Python's most popular data validation library, heavily used in FastAPI applications. It parses unstructured dictionary payloads into typed Class structures inheriting `BaseModel`. Hand-writing nested models can be tedious. This converter parses your sample JSON payload and generates clean, PEP8-compliant Pydantic models automatically.
Pydantic Conversion Mapping Details
- Nested Submodels: Automatically extracts child dictionaries and generates separate Pydantic model declarations.
- Typing Integrations: Maps JSON primitives to native Python types (`str`, `int`, `float`, `bool`), maps arrays to `List[...]`, and null fields to `Optional[...]`.
- FastAPI Ready: Generates code structures targeting modern Pydantic v2 syntax directly.
How to Convert JSON to Pydantic Models
- Paste your sample JSON payload into the input editor.
- Enter your custom root Pydantic Class name.
- Click Convert to Pydantic. The converter generates classes instantly.
- Copy or download your Python models code.