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⚡ Advanced Developer Toolbox Transform, Mock, Security & API Client
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Class / Model to JSON: Keys:
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Paste raw JSON, drag & drop a .json file, or choose a workflow below:

○ Waiting for JSON | Lines: 0 · Chars: 0 · Size: 0 B · Depth: 0
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Generated Output

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Paste JSON in the input panel and hit Beautify or Generate to see results here.

JSON to Pydantic v2 — Generate Typed Python Models for FastAPI

Pydantic v2 offers fast, strict runtime data validation in Python and FastAPI. Paste your raw JSON response and get back clean Pydantic v2 models inheriting from BaseModel, with automatic EmailStr, HttpUrl, UUID, and datetime inferencing.

Nullable values are correctly wrapped in Optional[...] and snake_case properties are matched with JSON keys using Field(alias='...').

❓ Frequently Asked Questions

Is processing on json-to-pydantic.html private and secure?

Yes. All JSON processing, parsing, and code generation happen 100% locally inside your browser sandbox. No server roundtrips or third-party tracking occur.

Is JSON Workbench free to use for JSON to Python Pydantic v2 Model Generator Online?

Yes, JSON Workbench is completely free for commercial and personal developer use with zero registration or payload limits.

Can I copy or download the generated output?

Yes! You can instantly copy the output code to your clipboard or download it as a structured file.

🧰 Complementary Developer Tools

📝 JSON Formatter & Beautifier ⚖️ Visual JSON Diff ⚡ Class to JSON Converter ✨ JSON Mock Data Generator