What Python version is required?

The generated code targets Python 3.10+ with modern type hint syntax using built-in generics (list[str] instead of List[str]).

Does it convert field names to snake_case?

Yes! JSON keys like 'firstName' are automatically converted to 'first_name' following Python's PEP 8 naming conventions.

How are nested objects handled?

Nested JSON objects generate separate dataclass definitions. Classes are ordered so dependencies appear first.

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JSON to Python Dataclass Generator

Generate Python dataclasses from JSON

100% client-side — your data never leaves your browser

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Input

OutputPython

Output will appear here...

Privacy guarantee:Unlike jsonformatter.org which leaked 80,000+ files in November 2025, JSONShield processes everything in your browser. Zero network requests with your data. Open your browser DevTools (Network tab) to verify — you'll see zero outbound requests containing your JSON.