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Posted on • Edited on • Originally published at apidog.com

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Top 10 Online Postman-Like Tools for API Testing and Development

API development is vital in modern software, and while Postman leads the way, developers are increasingly turning to alternatives that offer cloud support, team collaboration, and multi-protocol capabilities. In this guide, we’ll explore 10 Postman alternatives for 2025, each designed to optimize API testing and development.

1. Apidog

Apidog is an all-in-one API development tool that combines API testing, debugging, mocking, design, and documentation in a single platform. Supporting REST, GraphQL, and WebSocket APIs, Apidog provides a versatile solution for developers.

Apidog user interface

Key Features:

  • Real-time API testing and debugging: Visualize requests and responses in real time.
  • Collaborative workspace: Share APIs and test results instantly with your team.
  • Mock servers: Quickly create mock APIs in under a minute for testing or prototyping.
  • Environment management: Simplify environment switching for development, staging, or production.
  • CI/CD integration: Automate API tests in CI/CD pipelines seamlessly.
  • Automated documentation and code generation: Generate and share interactive API documentation, along with code snippets in multiple languages, for faster integration.

Why Apidog?

Apidog shines as a Postman alternative thanks to its robust features and intuitive interface. Start Testing APIs Online Now!


2. Hoppscotch

Hoppscotch is a fast, efficient, open-source API development tool that runs directly in your browser. It's ideal for developers seeking distraction-free API testing with minimal setup, supporting REST, GraphQL, and WebSocket protocols.

Hoppscotch user interface

Key Features:

  • Multi-protocol support: REST, GraphQL, WebSocket, and more.
  • Open-source and free: Completely free to use.
  • Request history: Save and revisit previous API requests.

Hoppscotch is perfect for developers working on small to medium projects who value speed and simplicity.


3. ReqBin

ReqBin offers a seamless online environment for testing APIs without requiring software downloads. It's ideal for quick API requests and debugging.

ReqBin user interface

Key Features:

  • HTTP method support: Test GET, POST, PUT, DELETE, and more.
  • Beginner-friendly: Intuitive interface with no learning curve.
  • Instant access: No sign-up required—start testing immediately.
  • Request history: Save and revisit previous API requests.
  • Code generation: Generate snippets for various programming languages.
  • Custom headers and parameters: Test APIs with tailored configurations.

ReqBin provides a hassle-free solution for testing APIs directly in your browser.


4. Beeceptor

Beeceptor is a straightforward API testing tool for creating custom endpoints. It’s especially handy for testing and mocking APIs during development.

Beeceptor user interface

Key Features:

  • Mock endpoints: Instantly create mock APIs.
  • Request inspection: Debug API requests in real time.
  • Custom responses: Tailor mock API responses as needed.

Beeceptor is a go-to tool for developers needing to test APIs in isolation before production integration.


5. Swagger Hub

Swagger Hub provides a comprehensive platform for designing, documenting, and testing APIs, with strong integration with Swagger/OpenAPI standards.

Swagger Hub user interface

Key Features:

  • API lifecycle management: Design, test, and document APIs in one place.
  • OpenAPI support: Create industry-standard API definitions.
  • Collaborative workspace: Work in real time with your team.
  • Version control: Manage multiple API versions effortlessly.
  • Mock servers: Build mock APIs for prototyping and testing.
  • CI/CD integration: Automate API testing within your pipelines.

Swagger Hub is ideal for teams prioritizing specification-driven API development.


6. Firecamp

Firecamp simplifies API testing with a user-friendly interface and support for REST, GraphQL, and WebSockets.

Firecamp homepage

Key Features:

  • Real-time collaboration: Share API tests and results with team members.
  • Protocol support: Test REST, GraphQL, WebSocket APIs, and more.
  • Customizable themes: Choose between light and dark themes.
  • Environment management: Define and manage variables across environments.
  • Code snippets: Generate snippets in various programming languages.

Firecamp is an excellent option for users seeking a unified API testing environment.


7. HTTPie Online

HTTPie Online delivers a minimalist yet powerful interface for testing APIs, focusing on simplicity and speed.

HTTPie Online user interface

Key Features:

  • Beginner-friendly: Intuitive design with no steep learning curve.
  • Data format support: Test APIs with JSON, forms, and more.
  • Browser-based: No installation required—use it anywhere.
  • Custom headers and parameters: Easily customize requests.

HTTPie Online is the perfect tool for developers who value streamlined workflows.


8. Stoplight

Stoplight is a design-first API platform that allows users to create, test, and mock APIs efficiently.

Stoplight user interface

Key Features:

  • Comprehensive API tools: Design, test, and document APIs.
  • Industry standards: Supports OpenAPI and JSON Schema.
  • Mock APIs: Build mock endpoints for faster testing.
  • API governance: Maintain API quality and consistency.
  • Real-time collaboration: Work together with your team.
  • Detailed analytics: Gain insights into API performance.

Stoplight is perfect for teams emphasizing design-first API development.


9. Apiary

Apiary offers a powerful platform for designing, testing, and monitoring APIs, with strong OpenAPI support.

Apiary user interface

Key Features:

  • Design-first development: Build APIs with Blueprint or OpenAPI specifications.
  • Mock APIs: Prototype and test APIs before deployment.
  • Analytics: Monitor API usage and performance.
  • Team collaboration: Collaborate in real time with team members.

Apiary simplifies the API lifecycle from initial design to deployment.


10. Assertible

Assertible is a reliable tool for automating API testing with seamless CI/CD integration.

Assertible user interface

Key Features:

  • Automated testing: Run scheduled API tests effortlessly.
  • Detailed analytics: Monitor API performance and reliability.
  • Custom assertions: Tailor tests to specific API responses.
  • Webhook testing: Validate webhook integrations.

Assertible is an excellent choice for developers focused on automating API testing within their workflows.

Conclusion

Choosing the right online API testing tool can significantly enhance your development workflow. Whether you’re looking for a Postman replacement or simply exploring new options, the tools listed above offer a wide range of features to meet your needs.

Apidog stands out as an all-in-one solution for API development, testing, and debugging. Its comprehensive feature set and user-friendly interface make it a top choice for developers worldwide.

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