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Swagger Codegen
Somerville, Massachusetts, United States
What it is
Swagger Codegen is an open-source tool that turns OpenAPI or Swagger definitions into API client libraries, server stubs, and documentation. Its template-driven engine parses specifications and generates boilerplate for client and server projects. Swagger says it supports client SDK generation in more than 40 languages and server code in more than 20. Listed capabilities include OpenAPI import, schema-to-code generation, custom templates, project scaffolding, an interactive API reference, and code samples. Outputs and integrations include HTML and Confluence Wiki documentation, Apache2 configuration files, and JMeter. The project is available through GitHub, with a hosted option in SwaggerHub; that platform can generate code in a selected language and push it to source-control repositories. Swagger Codegen is free under Apache-2.0. The repository warns that untrusted API descriptions or Swagger files may cause code injection and should be reviewed before generation.
For and against
For
- Generates client SDKs and server stubs
- Supports over 40 client languages
- Custom templates and project scaffolding
- OpenAPI import and schema-to-code generation
- Free Apache-2.0 open-source project
Against
- Untrusted specifications may cause code injection
- Generated files require review before use
- Hosted SwaggerHub option is separate from GitHub project
The verdict
Swagger Codegen provides broad language coverage and template-based generation for OpenAPI-driven projects. Teams should review input specifications carefully, especially when files come from untrusted sources.
Who it suits
Swagger Codegen suits API teams and developers who want generated clients, server foundations, documentation, or scaffolding from OpenAPI specifications. It supports self-hosted and web access across major desktop platforms.
Plans and prices
Open-source Swagger Codegen
client SDK generation · server-stub generation · documentation generation · 20+ server languages
Read 15 Oct 2026 · swagger.io
Swagger Codegen
Generates API clients, server stubs, and documentation from OpenAPI specifications
Read 8 Oct 2026 · swagger.io
On the record
- Build integrations
- Official workflow guidance covers Maven, Gradle and GitHub integration, including a script that pushes generated SDKs to GitHub.swagger.io · read 15 Oct 2026
- Client generation
- The product generates client SDKs in more than 40 languages.swagger.io · read 15 Oct 2026
- Client languages
- Swagger says Codegen can generate client SDKs in over 40 languages.swagger.io · read 8 Oct 2026
- Command-line use
- The CLI can be built with Maven and run as a Java JAR to generate a selected language target from a supplied specification.swagger.io · read 15 Oct 2026
- Company
- Swagger is presented as supported by SmartBear, which says it was founded in 2003 and lists its global headquarters in Somerville, Massachusetts.smartbear.com · read 8 Oct 2026
- Current release activity
- The GitHub releases page shows version 3.0.82 changes including a Jackson update to 2.21.5 and a 3.0.82 snapshot bump.github.com · read 15 Oct 2026
- Customization
- Users can replace Mustache templates with their own directory and create custom generator modules using the meta command.swagger.io · read 15 Oct 2026
- Docker CLI
- A standalone Docker image can run the CLI without installing Java, using a mounted local volume for generated output.swagger.io · read 15 Oct 2026
- Documentation depth
- The documentation includes versioning, prerequisites, building, Docker, generators, workflow integration, validation and contribution guidance.swagger.io · read 15 Oct 2026
- Documentation generation
- Supported documentation outputs include HTML and Confluence Wiki.swagger.io · read 15 Oct 2026
- Download and hosted option
- The open-source project is available from GitHub, and Swagger Codegen is also available in the integrated SwaggerHub platform.swagger.io · read 8 Oct 2026
- Generated-code ownership
- The project says generated code is supplied as-is, owned by the user and not automatically subject to the parent project license.github.com · read 15 Oct 2026
- Generation engine
- The project uses a template-driven engine to parse OpenAPI or Swagger definitions.github.com · read 8 Oct 2026
- Generators and integrations
- Listed outputs and integrations include HTML and Confluence Wiki documentation, Apache2 configuration files, and JMeter.github.com · read 8 Oct 2026
- Installation
- Official installation options include downloading a JAR from Maven Central and installing through Homebrew.swagger.io · read 15 Oct 2026
- Intended users
- Swagger describes Codegen as a way for API teams to reduce implementation plumbing and help end developers integrate with APIs.swagger.io · read 8 Oct 2026
- License
- The Homebrew formula identifies Swagger Codegen as Apache-2.0 licensed.formulae.brew.sh · read 15 Oct 2026
- Limit: beginner complexity
- An independent review lists complexity for beginners as a disadvantage.toolradar.com · read 15 Oct 2026
