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OpenAPI Generator VS Swagger Codegen

Compare OpenAPI Generator VS Swagger Codegen and see what are their differences

OpenAPI Generator logo OpenAPI Generator

OpenAPI Generator enables you to generate documentation, clients, and servers from OpenAPI 2.0/3.x documents without hassle.

Swagger Codegen logo Swagger Codegen

Swagger Codegen can reduce the complexities that arise in your build process by providing client SDKs and server stubs for any API you want.
  • OpenAPI Generator Landing page
    Landing page //
    2023-03-01
  • Swagger Codegen Landing page
    Landing page //
    2023-08-24

OpenAPI Generator features and specs

  • Wide Language Support
    OpenAPI Generator supports a broad range of programming languages, which allows developers to generate client libraries, server stubs, API documentation, and other code artifacts across various languages with ease.
  • Customizability
    The tool provides diverse customization options, including custom templates, configuration options, and overrides, enabling developers to tailor the generated code to meet specific project requirements.
  • Active Community
    OpenAPI Generator benefits from an active and engaged community that contributes to continuous improvements, bug fixes, and enhancements, ensuring the tool stays updated with evolving needs and standards.
  • Comprehensive Documentation
    It comes with extensive documentation and a rich set of resources that help users understand how to leverage the tool effectively for their projects.
  • Time-Efficiency
    Automating the generation of API-related code significantly reduces development time and effort, allowing teams to focus on implementing business logic rather than boilerplate code.

Possible disadvantages of OpenAPI Generator

  • Complexity
    Although powerful, OpenAPI Generator can be complex to configure and use effectively, especially for newcomers unfamiliar with OpenAPI specifications and generation nuances.
  • Generated Code Quality
    While the tool generates a significant amount of code, the quality of the generated code might not always match hand-crafted solutions, potentially requiring manual refinements and adjustments.
  • Heavy Dependency
    Relying on a code generator creates a dependency on the tool, which may complicate upgrades over time, especially if custom templates or configurations are heavily used.
  • Learning Curve
    There is a learning curve associated with understanding the OpenAPI specification and how to effectively use the generator, particularly for complex APIs and integrations.
  • Maintenance Overhead
    Keeping up with new releases and ensuring compatibility with updated OpenAPI standards can introduce additional maintenance overhead for teams using the tool extensively.

Swagger Codegen features and specs

  • Automation
    Swagger Codegen automates the process of generating client libraries, server stubs, API documentation, and more from an OpenAPI Specification. This reduces manual effort and speeds up development.
  • Multi-Language Support
    It supports a wide range of programming languages and frameworks, enabling developers to generate code for various platforms and technologies with ease.
  • Consistency
    By generating code from a single API specification, it ensures consistency across different client implementations, reducing the likelihood of discrepancies.
  • Community and Extensibility
    Swagger Codegen is open-source and has an active community, allowing users to contribute or extend functionality to meet specific needs through plugins or templates.

Possible disadvantages of Swagger Codegen

  • Customization Complexity
    While customization is possible, it can be complex and time-consuming, especially for teams that require highly customized code generation templates.
  • Learning Curve
    Using Swagger Codegen effectively requires understanding the OpenAPI Specification and the tool's configuration options, which may present a learning curve for new users.
  • Generated Code Quality
    The quality and performance of the generated code can vary depending on the language and framework. Developers may need to make significant modifications to meet production standards.
  • Dependency Management
    Generated projects may include dependencies that need careful management to ensure compatibility and security, which may add additional overhead to the development process.

OpenAPI Generator videos

Introducing OpenAPI Generator

More videos:

  • Review - Scaling the Test Coverage of OpenAPI Generator for 30+ Programming Languages - William Cheng

Swagger Codegen videos

Jesse Collis - Automatically Generating your API Client with Swagger and Swagger Codegen

Category Popularity

0-100% (relative to OpenAPI Generator and Swagger Codegen)
Development
66 66%
34% 34
Developer Tools
100 100%
0% 0
API Tools
0 0%
100% 100
Tool
60 60%
40% 40

User comments

Share your experience with using OpenAPI Generator and Swagger Codegen. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, OpenAPI Generator should be more popular than Swagger Codegen. It has been mentiond 45 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

OpenAPI Generator mentions (45)

  • Stop Advertising in Your Commits
    To be fair I've never used Laravel - but I do have a memory of code generators/scaffolders inserting files that made clear they were responsible for work /* * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech). * Do not edit the class manually. */. - Source: Hacker News / about 2 months ago
  • From Swagger UI to React: Building qcontroller's Frontend
    For the REST API communication, I leveraged OpenAPI Generator to automatically generate TypeScript client code. This API-first approach eliminates the common frontend-backend synchronization problems and ensures type safety across the entire stack. - Source: dev.to / 6 months ago
  • How and Why to Use Patches
    Patches are also useful if we're making manual modifications to any codebase that is being auto-generated, i.e. If we're using openapi-generator off of an OpenAPI spec to create clients and scaffolded server codebases. We would want to maintain the patch as a way to ensure that subsequent re-generations of the code don't wipe out any manual changes we have to make in-between. - Source: dev.to / about 1 year ago
  • Using OpenAPI to Automate API Integration With Rapyd's Payment Gateway
    Manually writing API clients can be time-consuming and result in errors. This is where the OpenAPI specification and tools like OpenAPI Generator are helpful. - Source: dev.to / over 1 year ago
  • Define, Generate, and Implement: An API-First Approach with OpenAPI Generator and FlightPHP
    With your API defined, use the OpenAPI Generator to generate your code automatically. The PHP Flight generator โ€” documented here โ€” was provided by the author and, although its status is still marked as "experimental", it has been my production workhorse for over a year. - Source: dev.to / over 1 year ago
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Swagger Codegen mentions (16)

  • 5 Best Tools to Instantly Generate API Documentation from Your Code
    Swagger remains the most popular name in API documentation, and for good reason. Built on the OpenAPI Specification, Swagger's tools like Codegen and Swagger UI allow you to generate human-readable and machine-readable documentation directly from your API schema. - Source: dev.to / 12 months ago
  • Why Generative AI Coding Tools and Agents Do Not Work For ME
    Https://swagger.io/tools/swagger-codegen/ In ten years I expect other generators/platforms exist too, that's merely one I'm familiar with. > you're not on the hook for fixing a specific instance of code, because you can just throw it away and have the AI do it all over. - Source: Hacker News / about 1 year ago
  • Swagger Made Simple: A Walkthrough of API Documentation
    Swagger Codegen is a tool that generates code from your API specifications. It creates templates for server or client apps in various languages, saving time by providing a base for API integration. - Source: dev.to / almost 2 years ago
  • How to Write Great API Documentation ๐Ÿ—’
    Swagger Codegen: Generate client libraries and API documentation (click here). - Source: dev.to / almost 2 years ago
  • How to Build Efficient CRUD Apps?
    Swagger Codegen: Automatically generates client SDKs, server stubs, and API documentation based on the OpenAPI specification. - Source: dev.to / almost 2 years ago
View more

What are some alternatives?

When comparing OpenAPI Generator and Swagger Codegen, you can also consider the following products

Widdershins - Widdershins is an open-source, easy to use Semoasa/ OpenAPI/ AsyncAPI/ definition to ReSlate/Slate compatible markdown released under the MIT License.

API Transformer - API Transformer is a powerful solution that enables you to Transform API specifications to any format.

API Spec Converter - API Spec Converter is an open-source solution that enables you to transform API descriptions between major formats like WADL, OpenAPI (fka Swagger), API Blueprint, RAML, and more.

Swagger UI - Swagger UI is a dependency-free collection of HTML, Javascript, and CSS assets that dynamically generate beautiful documentation from a Swag

Insomnia REST - Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a devโ€‘friendly UI, built-in automation, and an extensible plugin ecosystem.

ReadMe - A collaborative developer hub for your API or code.