JSON to Pydantic Model Generator — Free Online Tool
Generate Python Pydantic BaseModel classes from a JSON sample — nested objects, arrays, and aliases.
🔒 All processing happens in your browser. Your JSON is never uploaded or sent to any server.
How to Use
- Paste a JSON object (typically an API response) into the left pane.
- Optionally set the Root Model Name — this becomes the name of the outermost Pydantic class.
- Click Convert to generate Pydantic
BaseModelclasses, with aliases added automatically for non-Python-style keys. - Click Copy Result and paste into your Python project.
Frequently Asked Questions
Related Tools
JSON & DataJSON to Zod Schema
Generate a Zod schema from a JSON sample — nested objects, arrays, and optional fields.
JSON & DataJSON to JSON SchemaGenerate a JSON Schema (Draft-07) from a JSON sample — properties, types, and required fields.
JSON & DataJSON to TypeScript ConverterConvert a JSON object to TypeScript interfaces — nested types, optional fields, all client-side.
JSON & DataJSON Encoder & DecoderFormat, validate, and encode/decode JSON with Monaco editor — lenient parsing, local save, all client-side.
JSON & DataJSON to Dart ConverterConvert a JSON object to a Dart class with fromJson, toJson, and null-safe fields.
JSON & DataJSON to Python ConverterConvert a JSON object to Python dataclasses with from_dict, to_dict, and Optional typing.