Software Alternatives, Accelerators & Startups

swagger.io VS Swagger UI

Compare swagger.io VS Swagger UI and see what are their differences

swagger.io logo swagger.io

Swagger is an open source RESTapi Documentation Tool.

Swagger UI logo Swagger UI

Swagger UI is a dependency-free collection of HTML, Javascript, and CSS assets that dynamically generate beautiful documentation from a Swag
  • swagger.io Landing page
    Landing page //
    2023-05-11
  • Swagger UI Landing page
    Landing page //
    2023-09-17

swagger.io features and specs

  • Comprehensive Documentation
    Swagger.io offers extensive documentation that is easy to understand, making it accessible for both beginners and advanced users to document and visualize APIs.
  • Interactive API Exploration
    Swagger UI allows developers to test endpoints directly from the browser, which significantly enhances the API development and debugging process.
  • Automated Code Generation
    Swagger can generate client and server code in multiple languages, reducing the time and effort needed to develop APIs.
  • Standardization
    Swagger adheres to the OpenAPI Specification, which is widely recognized and helps in maintaining a standard format across different APIs.
  • Wide Adoption
    Being one of the most popular tools for API documentation, Swagger has a large community and wide industry adoption, which facilitates better support and resources.
  • Third-Party Integrations
    Swagger supports numerous third-party integrations, enabling seamless integration into CI/CD pipelines and other development workflows.

Possible disadvantages of swagger.io

  • Learning Curve
    Despite its comprehensive documentation, there can be a steep learning curve for beginners who are not familiar with API documentation and the OpenAPI Specification.
  • Complexity with Large APIs
    For very large APIs with numerous endpoints, the Swagger UI can become unwieldy and less performant, making it difficult to manage and visualize.
  • Customization Limitations
    While Swagger offers a lot of out-of-the-box features, there are limitations in terms of customizing the UI and some other aspects without delving into code.
  • Dependency on Additional Tools
    To fully utilize Swagger's capabilities, especially in code generation and testing, developers often need to rely on additional tools and libraries, which can add to the complexity.
  • Performance Overhead
    Running the Swagger documentation server can introduce some performance overhead, which might be noticeable in environments with limited resources.

Swagger UI features and specs

  • Interactive API Documentation
    Swagger UI provides a user-friendly interface where developers can interact with an API directly from the documentation, making it easier to understand and use.
  • Automated Documentation Generation
    Swagger UI can automatically generate API documentation from an OpenAPI Specification, reducing the time and effort required to write and maintain documentation manually.
  • Standardization
    It adheres to the OpenAPI Specification, a widely-accepted standard for defining APIs, which promotes consistency and interoperability across different tools and platforms.
  • Comprehensive Testing
    Developers can use the Swagger UI to test endpoints directly, allowing for quicker identification and resolution of issues during development.
  • Customization
    The UI can be customized to fit the specific needs and branding of a project, offering flexibility in how the API documentation is presented.
  • Community and Ecosystem
    Swagger UI is part of a larger Swagger suite of tools, supported by a large community and numerous plugins, enhancing its capabilities and integration options.

Possible disadvantages of Swagger UI

  • Learning Curve
    New users may find Swagger UI complex and might require some time to get familiar with the OpenAPI Specification and the tool’s features.
  • Performance
    For very large APIs with numerous endpoints and complex schemas, Swagger UI can experience performance slowdowns, affecting usability.
  • Initial Setup
    Setting up Swagger UI and configuring the OpenAPI Specification can be time-consuming and requires accuracy to ensure the documentation is correctly generated.
  • Dependency on OpenAPI Specification
    The effectiveness of Swagger UI is highly dependent on the accuracy and completeness of the OpenAPI Specification. Poorly defined specifications can lead to incomplete or incorrect documentation.
  • Security Concerns
    Exposing APIs in an interactive documentation tool can raise security concerns, particularly if sensitive functions are publicly accessible without proper authentication and authorization controls.

Category Popularity

0-100% (relative to swagger.io and Swagger UI)
API Tools
47 47%
53% 53
Documentation
59 59%
41% 41
Developer Tools
0 0%
100% 100
Documentation As A Service & Tools

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare swagger.io and Swagger UI

swagger.io Reviews

Introduction to Doxygen Alternatives In 2021
Swagger io is a software application In the Documentation as a Service & Tools department of a technology stack. It is an open-source tool. Swagger io is an independent set of Javascript, CSS, and HTML tools from a Swagger-compliant API that dynamically produces paperwork and sandbox.
Source: www.webku.net
Doxygen Alternatives
Swagger io is a software In the Documentation as a Service & Tools division of a technology stack. It is an open-source tool. Swagger io is an independent set of Javascript, CSS, and HTML tools from a Swagger-compliant API that dynamically creates documentation and sandbox.
Source: www.educba.com

Swagger UI Reviews

Top 20 Open Source & Cloud Free Postman Alternatives (2024 Updated)
Swagger UI is part of the Swagger ecosystem, providing tools for API design and documentation. It allows developers to visualize and interact with APIs effortlessly.
Source: medium.com
Postman Alternatives for API Testing and Monitoring
Swagger UI is a commonly used interactive visualization tool for RESTful web services, used for documenting, designing, and testing APIs. Swagger UI reads the OpenAPI specification document and generates an interactive documentation website. This web-based UI allows users to visualize and interact with the API’s resources without having any of the implementation logic in...
15 Best Postman Alternatives for Automated API Testing [2022 Updated]
One of the most appealing features is that Swagger UI is entirely customizable. You can freely modify your tool to meet your needs with complete access to the source code. Swagger UI makes an existing JSON or YAML document interactive. It creates a platform that organizes and categorizes our methods (get, put, post, delete).
Source: testsigma.com

Social recommendations and mentions

Based on our record, swagger.io should be more popular than Swagger UI. It has been mentiond 95 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.

swagger.io mentions (95)

  • How API Schema Validation Boosts Effective Contract Testing
    OpenAPI (Swagger): A comprehensive approach to API design that includes built-in schema validation capabilities. - Source: dev.to / 6 days ago
  • 🚀 The Ultimate Guide to REST API Design: Best Practices & Patterns You Can’t Ignore
    Not documenting your API (use tools like Swagger). - Source: dev.to / 2 months ago
  • Squido: A Beginner’s Guide to the HTML Website Generator
    Swagger API doc: It enables swagger and generates your super fast static API documentation. - Source: dev.to / 2 months ago
  • API Lifecycle Management: Key Strategies for Success
    Comprehensive documentation is vital for the success of an API. Providing clear, developer-friendly documentation helps users understand how to use the API effectively. Tools like Swagger and Postman offer powerful documentation capabilities. Swagger allows developers to create interactive API documentation, while Postman provides detailed guides and examples. For instance, a survey by Postman revealed that 95% of... - Source: dev.to / 2 months ago
  • API Titans Collide: OpenAPI vs. Swagger vs. Postman – The 2025 Developer’s Guide
    Imagine standing at the crossroads of innovation where three API titans—OpenAPI, Swagger, and Postman—are not just tools, but partners in your journey toward building robust, user-friendly APIs. In 2025, as the API landscape evolves faster than ever, choosing the right tool isn’t just about convenience—it’s about empowering your development process and giving your projects a competitive edge. - Source: dev.to / 3 months ago
View more

Swagger UI mentions (49)

  • Common Mistakes in RESTful API Design
    The OpenAPI Specification (formerly Swagger) has become the industry standard for documenting RESTful APIs. Tools like Swagger UI and ReDoc can generate interactive documentation from OpenAPI definitions, reducing the effort to maintain quality documentation. - Source: dev.to / about 1 month ago
  • Leveraging API Documentation for Faster Developer Onboarding
    Reference generators like Swagger UI Automatically create API references from OpenAPI specifications, keeping documentation in sync with the actual API. - Source: dev.to / about 1 month ago
  • How to Build a Task Manager API with Django REST Framework: Part 7 - API Documentation with OpenAPI and Swagger
    We’ll use OpenAPI (a standard for API specifications) and Swagger UI (a tool to visualize and interact with the API) to generate our documentation. The drf-spectacular library will help us create an OpenAPI schema for our DRF API and integrate Swagger UI seamlessly. - Source: dev.to / about 2 months ago
  • How to get RCE with LaTeX via file upload
    Who has never analyzed a website and ended up causing an error and discovered that the server was in debug mode and therefore revealing environment variables (like other URLs, database connection strings and even credentials) and routes to API endpoints and their respective Swagger UI documentation? Cool, and who has ever come across something called "LaTeX Compiler API 1.0" among those endpoints? - Source: dev.to / 3 months ago
  • The Good, the Bad, and the OpenAPI: Why Developers Love and Hate It
    Poor UI/UX – OpenAPI-generated documentation tools like Swagger UI are functional but often lack an intuitive experience. - Source: dev.to / 3 months ago
View more

What are some alternatives?

When comparing swagger.io and Swagger UI, you can also consider the following products

Doxygen - Generate documentation from source code

Postman - The Collaboration Platform for API Development

Apigee - Intelligent and complete API platform

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

DreamFactory - DreamFactory is an API management platform used to generate, secure, document, and extend APIs.

EchoAPI - Next-gen API development collaboration platform. More than just API design, debug, test, load-testing, and mock.