JSON to Python
Convert JSON to Python dataclasses with typing annotations. Optional and nullable fields are typed correctly. Runs entirely in your browser.
JSON input
Generated Python
What this tool does
This JSON to Python converter takes a JSON document and generates Python type definitions from its shape. It runs entirely in your browser — your data never leaves the page.
How it works
1. Infer types. Every value is inspected: strings, numbers, booleans, null, arrays and nested objects.
2. Merge shapes. Array items are merged so optional fields stay optional.
3. Name fields. Keys become valid target-language identifiers.
4. Emit code. Python definitions preserve original JSON keys.