OpenAPI Generator
OpenAPI Generator: A flexible open-source toolkit for multi-language API generation and workflow integration. Ranked #1 of 33 in Code Generators by our editors (9.3/10); pricing: Free plan; best for broad multi-language API generation.
At a glance
- Editor score9.3 / 10
- PricingFree plan
- Best forBroad multi-language API generation
- Free planYes
- Paid fromFree
- Project scaffoldingYes
- Facts checked20 Sep 2026
Where it wins
- Generates clients, server stubs, documentation, schemas, and configuration outputs
- Supports a wide range of languages, including Java, Python, Go, Rust, and TypeScript
- Fits Maven, Gradle, Bazel, GitHub, CI/CD, npm, Docker, and other workflows
Where it doesn't
- Requires OpenAPI 2.0 or 3.x documents as the generation input
- Advanced output changes may require user-defined templates or custom generators
- Its broad generator range may require evaluation to choose the right output
Our verdict on OpenAPI Generator
OpenAPI Generator is an open-source code-generation toolkit for developers and API teams working from OpenAPI 2.0 and 3.x documents. It can produce API client libraries, server stubs, documentation, configuration files, and schemas. The supported language list spans ActionScript, C#, C++, Go, Java, JavaScript, Kotlin, PHP, Python, Ruby, Rust, Swift, TypeScript, and many others. It is suited to teams that need API artifacts across different languages and frameworks rather than a generator focused on one stack.
Pricing is straightforward: the core project is open source and has a free plan, with no paid product tiers described. The toolkit is available across web, Windows, macOS, and Linux, and can run through a CLI, npm, Homebrew, Docker, or a JAR. CLI commands cover generation, validation, generator listing, and version checks. Integration options include Maven, Gradle, sbt, Bazel, Cake, GitHub, and CI/CD workflows, giving teams several ways to place generation inside existing build and delivery processes.
Customization is a major part of the product’s scope. Users can adjust generated output with configuration options and user-defined templates, while the meta command supports creating custom generators. Beyond client and server code, OpenAPI Generator can create HTML, Confluence Wiki, Asciidoc, Markdown, and PlantUML documentation, along with GraphQL and MySQL schemas. That breadth suits teams maintaining varied API deliverables, but it also means selecting and tailoring generators is part of the work. Choose it when multi-language coverage, automation, and output control matter; consider a narrower tool when a single framework or simpler workflow is the priority.
Your product? Our editors can test OpenAPI Generator in depth and publish a review, labelled as paid · from $149/mo →
OpenAPI Generator pricing
OpenAPI Generator fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Project scaffolding | Yes |
| Custom templates | Yes |
| Schema-to-code generation | Yes |
| CLI available | Yes |
| IDE plugins | Yes |
| Supported languages | ActionScript, Ada, Apex, Bash, C, C#, C++, Clojure, Crystal, Dart, Elixir, Elm, Eiffel, Erlang, F#, Go, Groovy, Haskell, Java, JavaScript, Julia, Kotlin, Lua, Nim, Objective-C, OCaml, Perl, PHP, PowerShell, Python, R, Ruby, Rust, Scala, Swift, TypeScript, Xojo |
| Deployment | Cloud, Self-hosted |
| Platforms | Web, Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 10 integrations: Maven, Gradle, sbt, Bazel, Cake, GitHub … See all → |
| Pricing | Free plan |
| Website | openapi-generator.tech |
| Facts checked | 20 Sep 2026 |
OpenAPI Generator integrations
OpenAPI Generator lists 10 integrations on its own site.
- Maven
- Gradle
- sbt
- Bazel
- Cake
- GitHub
- CI/CD
- npm
- Homebrew
- Docker
See all OpenAPI Generator integrations →
Alternatives to OpenAPI Generator
- Swagger CodegenA broad OpenAPI code generator with strong language coverage and CLI access.9.1
- Spring InitializrA focused, extensible way to start Spring Boot projects with the right build and dependency choices.9.0
- Angular CLIA focused, open-source toolkit for generating, building, testing, and maintaining Angular projects.8.8
See all OpenAPI Generator alternatives →
OpenAPI Generator vs the competition
- OpenAPI Generator vs Swagger Codegen
- OpenAPI Generator vs Spring Initializr
- OpenAPI Generator vs Angular CLI
- OpenAPI Generator vs Microsoft Kiota
- OpenAPI Generator vs Symfony MakerBundle
- OpenAPI Generator vs Nx
Compare OpenAPI Generator with any tool side by side →
Also Ranked In
OpenAPI Generator is ranked in 3 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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