Fiddler icon
Fiddler icon

Fiddler

 203 likes

Web Debugging Proxy that logs all HTTP(S) traffic for comprehensive analysis. It allows manipulation of traffic, supports scripting, and extends with .NET. Debugs virtually any application, implementing man-in-the-middle interception with self-signed certificates. Freeware, ideal for developers.

Fiddler screenshot 1

License model

  • FreemiumProprietary

Country of Origin

  • US flagUnited States

Platforms

  • Windows
3.4 / 5 Avg rating (7)
203likes
6comments
0news articles

Features

Suggest and vote on features
  1.  HTTP Monitoring
  2.  Debugging
  3.  Web page Debugging
  4.  HTTP(S) Debugging
  5.  HTTP Proxy
  6.  Traffic Monitoring
  7.  One click installation

 Tags

Fiddler News & Activities

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Recent activities

  • Bear808 liked Fiddler
    about 1 month ago
  • GanderPL reviewed Fiddler  
    about 1 month ago

    I want try, so download, install, and register. After activate: "Trial Access Denied!" Data Phishing

  • POX added Fiddler as alternative to OpenAstra
    2 months ago
  • Maoholguin updated Fiddler
    2 months ago
  • App icon
    POX added Fiddler as alternative to Network Spoofer
    4 months ago
  • not_cool liked Fiddler
    5 months ago
  • App icon
    K0RR added Fiddler as alternative to ApiClient
    7 months ago
  • AuthoritativeProtocol and prohodev liked Fiddler
    8 months ago
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Fiddler information

  • Developed by

    US flagTelerik
  • Licensing

    Proprietary and Freemium product.
  • Pricing

    Subscription that costs $12 per month + free version with limited functionality.
  • Rating

    Average rating of 3.4
  • Alternatives

    46 alternatives listed
  • Supported Languages

    • English

AlternativeTo Categories

Network & AdminDevelopment

Our users have written 6 comments and reviews about Fiddler, and it has gotten 203 likes

Fiddler was added to AlternativeTo by Ola Johansson on Dec 6, 2009 and this page was last updated Feb 15, 2025.

Comments and Reviews

   
 Post comment/review
Top Positive Comment
eyal0
Jul 23, 2012
3

I use fiddler more than Firebug and Wireshark because:

  • Firebug only works in Firefox and I do most of my work in Chrome. Also, Firebug is a Firefox extension so it can be a little clumsy at times.

  • Wireshark is often overkill when you want to debug http traffic. With Fiddler it's easier to see the http sent and the response with just a click. With Wireshark, the process to recompose the packets and uncompress them is not as easy.

  • Fiddler can do https with just one click. With Fiddler you spy on encrypted traffic and there's nothing special to install.

[Edited by eyal0, July 23]

Top Negative Comment
Confusius
Apr 1, 2018
10

Since Eric Lawrence handed it to that Telerik company, this gem is now literally useless malware.

GanderPL
Mar 19, 2025
0

I want try, so download, install, and register. After activate: "Trial Access Denied!" Data Phishing

Femo Bayani
Jul 19, 2022
0

Free and has a ton of features

steel30
Jun 12, 2021
0

best http rewrite tool for windows

kilvaiden
Jul 1, 2019
1

great for sniffing http(s) requests

What is Fiddler?

Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data. Fiddler includes a powerful event-based scripting subsystem, and can be extended using any .NET language.

Fiddler captures HTTP and HTTPS traffic and logs it for the user to review (the latter by implementing man-in-the-middle interception using self-signed certificates).

Fiddler is freeware and can debug traffic from virtually any application, including Internet Explorer, Mozilla Firefox, Opera, and thousands more.