Swagger

Freemium

swagger.io

Leading open-source API tooling ecosystem and design suite for building, documenting, and consuming OpenAPI specifications.

About Swagger

Swagger is the foundational tooling framework that created the modern OpenAPI Specification standard. Maintained by SmartBear, the Swagger ecosystem provides software developers with an essential suite of open-source and commercial tools to design, document, test, and consume RESTful web services in full compliance with OpenAPI 2.0 and 3.0 standards.

The suite features Swagger UI, which generates interactive, browser-based documentation allowing engineers to execute live HTTP requests directly from the browser window. Additionally, Swagger Editor provides real-time schema validation and linting, while Swagger Codegen autonomously generates client SDK libraries and server stubs across more than 40 programming languages from a single specification file.

Swagger provides foundational tools like Swagger UI, Editor, and Codegen completely free and open-source, alongside SwaggerHub, a cloud-hosted collaborative design platform that offers automated team workflows, style governance, and enterprise access controls.

Key Features

Core capabilities and technical highlights of Swagger

Industry-standard Swagger UI delivering interactive browser documentation with live try-it-out capabilities.

Swagger Editor providing browser-based schema authoring with immediate syntax checking and OpenAPI validation.

Swagger Codegen generating ready-to-run server stubs and client libraries across dozens of programming languages.

Collaborative SwaggerHub platform providing centralized team repositories, versioning, and design style checks.

Popular Use Cases

How teams, developers, and creators get value from Swagger

1Render interactive HTML documentation for REST APIs allowing developers to test endpoints directly from the browser.

2Author and validate OpenAPI 3.0 specifications using real-time syntax linting and schema autocompletion.

3Generate native client SDK libraries in TypeScript, Python, and Java automatically using Swagger Codegen.

4Standardize API design rules across corporate development teams using SwaggerHub automated linting policies.

Frequently Asked Questions

Common questions and answers regarding Swagger

Is Swagger free?

Yes, core tools including Swagger UI, Swagger Editor, and Swagger Codegen are open-source and completely free, while SwaggerHub provides paid team collaboration features.

What is the difference between Swagger and OpenAPI?

OpenAPI is the official specification standard for describing REST APIs, whereas Swagger refers to the tooling suite created by SmartBear to work with OpenAPI.

Can Swagger generate client code?

Yes, Swagger Codegen automatically generates client SDKs and server scaffolding for over 40 programming languages from an OpenAPI definition.

Does Swagger UI work with private APIs?

Yes, Swagger UI can be embedded locally within any private application codebase to serve internal documentation.

What is SwaggerHub?

SwaggerHub is the commercial cloud platform that adds team collaboration, version management, and automated design governance on top of open-source Swagger.