JSON → Python Class
Generate Python classes from JSON. Supports Pydantic.
JSON Input0 chars
Output
Lines: -Size: -
🛡️️Zero server logs. Conversion runs 100% inside your browser.
JSON → Python Class
Generate Pydantic v2 models from JSON with Field aliases for camelCase compatibility. Handles proper class ordering and type hints. 100% client-side.
🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs
How to Use
- Paste your JSON data into the input editor.
- Click Convert to generate Pydantic BaseModel classes.
- Copy the generated Python code with alias mappings for camelCase JSON compatibility.
Frequently Asked Questions
Questions about this tool? We have got answers.
Why use Field(alias=...)?
Python uses snake_case while JSON uses camelCase. Field aliases allow Pydantic to deserialize camelCase JSON while keeping Pythonic field names.
How are classes ordered?
Referenced types are defined before they are used. Child classes appear before the parent root class to prevent NameError.
Is my data sent to a server?
No. All conversion is 100% client-side in your browser.
Tool Changelog & Updates
v1.1.02026-06-12
- Fix: Generated Pydantic v2 models with proper Field aliases for camelCase JSON compatibility, correct class ordering (child before parent), and int for integer values.
- Feature: Accurate number type mapping — integer values map to the language's native integer type, decimal values map to float/double.
- UX: Updated module descriptions, How-to guides, and FAQ sections with multi-language support.
- Fix: Fixed "Conversion complete" toast showing even when JSON parsing failed — now only shows success on actual completion, shows error message on failure.
1.0.02026-06-09
- Feature: Initial release