Fiddler AlternativesOnly apps categorised as API Clients

The best API Client alternative to Fiddler is HTTP Toolkit, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Fiddler and ten of them are API Clients so hopefully you can find a suitable replacement. Other interesting API Client alternatives to Fiddler are Requestly, HttpMaster, Advanced REST Client and Stoplight.

filter to find the best alternatives

Fiddler alternatives are mainly API Clients, but if you're looking for HTTP Clients or HTTP(S) Debuggers you can filter on that. Other popular filters include Mac, Linux, Open Source, Mac + Open Source, Windows, iPhone and Google Chrome. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Fiddler.
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Alternatives list

  1. HTTP Toolkit icon

    HTTP Toolkit

     102 likes

    HTTP Toolkit is a beautiful, cross-platform & open-source HTTP(S) debugging proxy, analyzer & client, with built-in support for modern tools and automatic interception for clients from Docker to Android to iOS.

    51 HTTP Toolkit alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Docker
    HTTP Toolkit screenshot 1
     
  2. Requestly icon

    Requestly

     33 likes

    Requestly is a lightweight proxy available as a browser extension & desktop app to intercept & modify network requests. Using Requestly you can Modify Headers, Redirect Url, Mock API response, Delay/Throttle requests, etc.

    38 Requestly alternatives

    Cost / License

    • Freemium
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Microsoft Edge
    • Google Chrome
    • Software as a Service (SaaS)
    • Selenium
    • Firefox
    Modify HTTP Headers
     
  5. Advanced REST Client icon

    Advanced REST Client

     27 likes

    API testing tool. Which allows web developers to create and test custom HTTP requests.

    Cost / License

    • Free
    • Open Source

    Application types

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • Chrome OS
    • AppImageHub
    • Google Chrome
    • Chromium
    Advanced REST Client screenshot 1
     
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    1
  6. Stoplight icon

    Stoplight

     12 likes

    Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality, all with an easy, enjoyable developer experience.

    49 Stoplight alternatives

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    Stoplight screenshot 1
     
  7. Apidog icon

    Apidog

     5 likes

    Design and debug APIs in a powerful visual editor. Describe and debug easily with JSON Schema support. Apidog is a complete set of tools that connects the entire API lifecycle, helping R&D teams implement best practices for API Design-first development.

    48 Apidog alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    Apidog screenshot 1
     
  9. ArdorQuery icon

    ArdorQuery

     1 like

    ArdorQuery is a cross-platform tool for performing any HTTP(S) endpoints like REST API, HTML, Images, GraphQL, OData etc.

    Cost / License

    Application types

    Platforms

    • Mac
    • Linux
    • Flathub
    ArdorQuery screenshot 1
     
  10. API Tester icon

    API Tester

     6 likes

    API Tester is the first mobile app to test any type of API on the go. Test REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, and HTTPS APIs completely for free, on iOS or Android.

    58 API Tester alternatives

    Cost / License

    • Free
    • Proprietary

    Application types

    Platforms

    • Mac
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • iPad
    Test any type of API
     
  11. ApiClient icon

    ApiClient

     Like

    Helps you to test the Rest API with your phone including features like import, edit and export postman collections.With this, you don't need to look for your laptop or PC whenever you need to test and modify your REST APIs. You can work on them anytime, on the go.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Android
    ApiClient screenshot 1
     
  12. RestCase icon

    RestCase

     1 like

    RestCase is a security-focused API development platform that enables its users to rapidly create secure microservices, mock them in order to start testing, monitor APIs and collaborate on their development and testing.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    RestCase screenshot 1
     
10 of 10 Fiddler alternatives