juhaku/utoipa

Health v2 · maintenance only

Adoption not part of the score

4054 stars · 443 forks observed · 2026-08-28

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

Utoipa is a Rust library that auto-generates OpenAPI documentation at compile time using proc macros, treating a code-first approach as a first-class citizen. It is framework-agnostic and also allows writing OpenAPI specs directly with Rust types.

Use cases

• generate OpenAPI docs for a Rust REST API from code annotations
• avoid manually maintaining OpenAPI YAML or JSON files
• serve Swagger UI for a Rust web service
• document actix-web, axum, or rocket endpoints with macros
• build an OpenAPI spec using Rust types without a web framework

When to choose

• you write REST APIs in Rust and want compile-time generated OpenAPI documentation
• you want docs to stay in sync with your code automatically
• you need framework-agnostic OpenAPI generation with integrations for popular Rust web frameworks

When to avoid

• your API is not in Rust
• you prefer spec-first (OpenAPI YAML/JSON) workflows with generated code
• you need runtime-generated documentation rather than compile-time

Facets

library · maturity stable

api-documentation documentation web-development backend apis documentation rust cross-platform openapi swagger rest-api proc-macros compile-time code-first actix-web axum rocket codegen

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