koxudaxi/datamodel-code-generator

Health v2 · maintenance only

Adoption not part of the score

4042 stars · 465 forks observed · 2026-10-21

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A Python CLI tool that generates type-safe Python data models (Pydantic v2, dataclasses, TypedDict, msgspec.Struct) from schema definitions like OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON/YAML/CSV. It handles complex schema features such as $ref, allOf/oneOf/anyOf, enums, and nested types, and can also retarget existing Python model classes to a different output type.

Use cases

• generate pydantic models from openapi spec
• convert schema to python dataclasses
• generate typeddict from yaml schema
• create python models from graphql schema
• generate msgspec structs from protobuf
• generate pydantic models from raw data
• codegen python types for fastapi from swagger

When to choose

• you need Python model classes from API or schema definitions
• you want type-safe, validated models for Pydantic v2, dataclasses, TypedDict, or msgspec
• you want to automate model generation in CI from OpenAPI/JSON Schema sources

When to avoid

• you need runtime schema validation rather than code generation
• you target languages other than Python
• you need hand-crafted models with custom logic that generated code would overwrite

Facets

cli-tool · maturity active

parser serialization developer-tools developer-tools apis web-development backend python cli cross-platform pydantic openapi -schema codegen dataclasses typeddict msgspec graphql protobuf avro fastapi code-generation

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