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Fiddler vs Postman: What are the differences?

Fiddler and Postman are two widely used tools in the realm of API testing and development. Let's delve into the key distinctions between these two tools.

  1. Installation Process: Fiddler necessitates a standalone installation, deploying its own application that needs to be installed on the user's machine. It provides a comprehensive set of features, including traffic capturing and analysis. Postman, on the other hand, is a cloud-based platform with an additional option for a desktop application. Users can access Postman through their web browser or install the desktop version based on their preferences.

  2. User Interface and Workflow: Fiddler offers a desktop application with a robust and feature-rich user interface, catering to advanced users who require in-depth traffic monitoring and analysis capabilities. Postman provides a user-friendly interface with a focus on simplifying the API testing and development workflow. Its clean and intuitive design appeals to both beginners and experienced developers.

  3. Request Building and Customization: Fiddler allows users to manually construct HTTP requests and inspect responses. It offers advanced customization options, making it suitable for intricate scenarios and detailed request/response analysis. Postman, while also supporting manual request building, excels in providing a visual and intuitive way to create and customize requests through its user-friendly interface, making it accessible for users with varying technical backgrounds.

  4. Collaboration and Sharing: Fiddler primarily operates on a local machine, limiting collaborative features. Sharing captured traffic or analysis typically requires exporting and sharing files. Postman, being a cloud-based platform, facilitates collaboration by allowing users to share and collaborate on API collections. It provides features for team collaboration, making it easy to work on API development projects collectively.

  5. Automation and Scripting: Fiddler supports scripting and automation through the FiddlerScript language, allowing users to create custom rules and automate certain tasks. Postman offers a powerful scripting environment using JavaScript, enabling users to automate API tests, set up pre-request scripts, and define complex workflows within the tool.

  6. Integration and Ecosystem: Fiddler integrates with various third-party tools and extensions, enhancing its functionality based on user needs. It provides a versatile ecosystem for extending capabilities. Postman boasts an extensive ecosystem with support for a wide range of integrations, including CI/CD pipelines, version control, and collaboration platforms, providing a seamless development experience.

In summary, Fiddler empowers you to dissect and manipulate API traffic, while Postman helps you design, test, and document APIs efficiently.

Advice on Fiddler and Postman
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Swagger UISwagger UI

From a StackShare Community member: "I just started working for a start-up and we are in desperate need of better documentation for our API. Currently our API docs is in a file. We are evaluating Postman and Swagger UI. Since there are many options and I was wondering what other StackSharers would recommend?"

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Replies (3)
Jagdeep Singh
Tech Lead at | 8 upvotes 路 381.8K views

I use Postman because of the ease of team-management, using workspaces and teams, runner, collections, environment variables, test-scripts (post execution), variable management (pre and post execution), folders (inside collections, for better management of APIs), newman, easy-ci-integration (and probably a few more things that I am not able to recall right now).

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I use Swagger UI because it's an easy tool for end-consumers to visualize and test our APIs. It focuses on that ! And it's directly embedded and delivered with the APIs. Postman's built-in tools aren't bad, but their main focus isn't the documentation and also, they are hosted outside the project.

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Sadik Ay

I recommend Postman because it's easy to use with history option. Also, it has very great features like runner, collections, test scripts runners, defining environment variables and simple exporting and importing data.

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Decisions about Fiddler and Postman
Stephen Fox
Artificial Intelligence Fellow | 1 upvote 路 337.4K views

Postman supports automation and organization in a way that Insomnia just doesn't. Admittedly, Insomnia makes it slightly easy to query the data that you get back (in a very MongoDB-esque query language) but Postman sets you up to develop the code that you would use in development/testing right in the editor.

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Pros of Fiddler
Pros of Postman
    Be the first to leave a pro
    • 490
      Easy to use
    • 369
      Great tool
    • 276
      Makes developing rest api's easy peasy
    • 156
      Easy setup, looks good
    • 144
      The best api workflow out there
    • 53
      It's the best
    • 53
      History feature
    • 44
      Adds real value to my workflow
    • 43
      Great interface that magically predicts your needs
    • 35
      The best in class app
    • 12
      Can save and share script
    • 10
      Fully featured without looking cluttered
    • 8
    • 8
      Option to run scrips
    • 8
      Global/Environment Variables
    • 7
      Shareable Collections
    • 7
      Dead simple and useful. Excellent
    • 7
      Dark theme easy on the eyes
    • 6
      Awesome customer support
    • 6
      Great integration with newman
    • 5
    • 5
    • 5
      The test script is useful
    • 4
      Saves responses
    • 4
      This has simplified my testing significantly
    • 4
      Makes testing API's as easy as 1,2,3
    • 4
      Easy as pie
    • 3
    • 3
      I'd recommend it to everyone who works with apis
    • 3
      Mocking API calls with predefined response
    • 2
      Now supports GraphQL
    • 2
      Postman Runner CI Integration
    • 2
      Easy to setup, test and provides test storage
    • 2
      Continuous integration using newman
    • 2
      Pre-request Script and Test attributes are invaluable
    • 2
    • 2
    • 1
      <a href="">useful tool</a>

    Sign up to add or upvote prosMake informed product decisions

    Cons of Fiddler
    Cons of Postman
      Be the first to leave a con
      • 10
        Stores credentials in HTTP
      • 9
        Bloated features and UI
      • 8
        Cumbersome to switch authentication tokens
      • 7
        Poor GraphQL support
      • 5
      • 3
        Not free after 5 users
      • 3
        Can't prompt for per-request variables
      • 1
        Import swagger
      • 1
        Support websocket
      • 1
        Import curl

      Sign up to add or upvote consMake informed product decisions

      What is Fiddler?

      It is a free web debugging proxy for any browser, system or platform. It helps you debug web applications by capturing network traffic between the Internet and test computers. The tool enables you to inspect incoming and outgoing data to monitor and modify requests and responses before the browser receives them.

      What is Postman?

      It is the only complete API development environment, used by nearly five million developers and more than 100,000 companies worldwide.

      Need advice about which tool to choose?Ask the StackShare community!

      What companies use Fiddler?
      What companies use Postman?
      See which teams inside your own company are using Fiddler or Postman.
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      What tools integrate with Fiddler?
      What tools integrate with Postman?
        No integrations found

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