TheOpenAPI Specification (OAS), previously known as theSwagger Specification, is a specification for a programming language-agnostic, machine-readable interface definition language for describing, producing, consuming, and visualizing web services. OpenAPI documents describe API services and are represented in YAML or JSON formats.

The OpenAPI Specification Repository

• UpdatedJul 18, 2025
• Markdown

Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.

• UpdatedJul 17, 2025
• JavaScript

📘 OpenAPI/Swagger-generated API Reference Documentation

• UpdatedJul 17, 2025
• TypeScript

swagger-codegen contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition.

• UpdatedJul 15, 2025
• Mustache

Swagger Editor

• UpdatedJul 11, 2025
• JavaScript

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

• UpdatedJul 18, 2025
• Java

orval is able to generate client with appropriate type-signatures (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification, either in yaml or json formats. 🍺

• UpdatedJul 18, 2025
• TypeScript

Swagger module for node.js

• UpdatedSep 14, 2022
• JavaScript

Easy OpenAPI specs and Swagger UI for your Flask API

• UpdatedJun 17, 2024
• Python

Automated generation of real Swagger/OpenAPI 2.0 schemas from Django REST Framework code.

• UpdatedJul 17, 2025
• Python

Library for OpenAPI 3 with spring-boot

• UpdatedJul 10, 2025
• Java

OpenAPI based HTTP Client code generator

• UpdatedJul 17, 2025
• C#

A flexible JSON/YAML linter for creating automated style guides, with baked in support for OpenAPI (v3.1, v3.0, and v2.0), Arazzo v1.0, as well as AsyncAPI v2.x.

• UpdatedJun 24, 2025
• TypeScript

Javascript library to connect to swagger-enabled APIs via browser or nodejs

• UpdatedJul 15, 2025
• JavaScript

Sane and flexible OpenAPI 3 schema generation for Django REST framework.

• UpdatedJun 6, 2025
• Python

Translate APIs described by OpenAPI Specifications (OAS) into GraphQL

• UpdatedMay 8, 2025
• TypeScript

A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..

• UpdatedJul 7, 2025
• Python

Utility for comparing two OpenAPI specifications.

• UpdatedJul 16, 2025
• Java

OpenAPI Diff and Breaking Changes

• UpdatedJul 18, 2025
• Go

Swagger Spec to Java POJOs

• UpdatedJul 8, 2025
• Java