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Open Source Fiddler Alternatives

The best open source alternative to Fiddler is Wireshark. If that doesn't suit you, our users have ranked more than 25 alternatives to Fiddler and 14 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Fiddler are mitmproxy, OWASP Zed Attack Proxy (ZAP), HTTP Toolkit and Stoplight.

Fiddler alternatives are mainly Web Debuggers but may also be HTTP(S) Debuggers or HTTP Clients. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Fiddler.
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Fiddler iconFiddler
  196
  • FreemiumProprietary
  • Windows

Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you...

Learn more about Fiddler

  1. Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It is the de facto (and often de jure) standard across many industries and educational institutions.

    Is this a good alternative?
    Yes
    No
    Wireshark vs Fiddler opinions
    pros, cons and recent comments

    Wireshark is a packet analyzer, not an alternative to debugging proxy like Fiddler or MITM are.

    Positive comment ago
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    1
  2. mitmproxy icon

    mitmproxy

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    mitmproxy is an SSL-capable man-in-the-middle proxy for HTTP. It provides a console interface that allows traffic flows to be inspected and edited on the fly.

    Is this a good alternative?
    Yes
    No
    mitmproxy vs Fiddler opinions
    Most users think mitmproxy is a great alternative to Fiddler.

    mitmproxy is free and well featured, but fiddler does have an easier workflow to start with

    Positive comment ago
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    It's able to analyze http requests made by other proxies, many other of the alternatives here only allow creating requests

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    mitmproxy is able to edit response data

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    4


  3. OWASP Zed Attack Proxy (ZAP) icon

    OWASP Zed Attack Proxy (ZAP)

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding vulnerabilities in web applications.

    Is this a good alternative?
    Yes
    No
    OWASP Zed Attack Proxy (ZAP) vs Fiddler opinions
    This alternative is disputed. OWASP Zed Attack Proxy (ZAP) is still a legitimate alternative to Fiddler, but it might have issues that some users think are important.

    ZAP is a proxy for attacks, not a proxy for development

    Negative comment ago
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    6
  4. HTTP Toolkit is a beautiful, cross-platform & open-source HTTP(S) debugging proxy, analyzer & client, with built-in support for modern tools from Docker to Android to GraphQL.

    Is this a good alternative?
    Yes
    No
  5. Stoplight icon

    Stoplight

    • Free PersonalOpen Source
    • Mac
    • Windows
    • Linux
    • Online

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

    Is this a good alternative?
    Yes
    No


  6. NetworkMiner icon

    NetworkMiner

    • FreeOpen Source
    • Windows

    NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows. NetworkMiner can parse PCAP files and regenerate/reassemble transmitted files and certificates from PCAP files with HTTP, FTP, SMB, SMB2, TFTP and several other protocols.

    Is this a good alternative?
    Yes
    No
  7. Advanced REST Client (ARC) icon

    Advanced REST Client (ARC)

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Chrome OS
    • Google Chrome
    • Chromium
    • Chrome Web Store

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

    Is this a good alternative?
    Yes
    No
    Advanced REST Client (ARC) vs Fiddler opinions
    This alternative is disputed. Advanced REST Client (ARC) is still a legitimate alternative to Fiddler, but it might have issues that some users think are important.

    Fiddler is a Proxy tool used to intercept and examine HTTP requests not to create an test HTTP requests.

    Negative comment ago
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    5
  8. HttpRequester icon

    HttpRequester

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Firefox

    HttpRequester is a tool for Firefox for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.

    Discontinued

    Doesn't support Firefox WebExtensions:https://github.com/tommut/HttpRequester/issues/43Also latest commit d62a6ea on Mar 12, 2017.

    Is this a good alternative?
    Yes
    No
  9. James icon

    James

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • React
    • Electron / Atom Shell
    • Node.JS

    James is a HTTP Proxy and Monitor that enables developers to view and intercept requests made from the browser. It is an open-source alternative to the popular developer tool Charles.

    Discontinued

    Not sure if 'discontinued' is quite right, but James has now officially moved in 'maintenance mode', with little or no ongoing development or support. See the readme: https://github.com/james-proxy/james#this-project-is-in-maintenance-mode.It would be helpful to highlight that here imo.

    Is this a good alternative?
    Yes
    No
  10. HTTP Header Live icon

    HTTP Header Live

    • FreeOpen Source
    • Windows
    • Online
    • Google Chrome
    • Firefox

    Displays the HTTP header. Edit it and send it.

    Is this a good alternative?
    Yes
    No
Showing 10 of 14 alternatives