Fiddler icon
Fiddler icon

Fiddler

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

Cost / License

  • Freemium (Subscription)
  • Proprietary

Application type

Platforms

  • Windows
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208likes
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Recent activities

  • Cloak Proxy icon
    secman added Fiddler as alternative to Cloak Proxy
  • Quena icon
    Maik-Hofmann added Fiddler as alternative to Quena
  • Boris Sundic rated Fiddler  
  • Boris Sundic liked Fiddler
  • Piper HTTPS Proxy icon
    Tom-Wolf added Fiddler as alternative to Piper HTTPS Proxy
  • Packet Capture Pro icon
    REALSIGNAL added Fiddler as alternative to Packet Capture Pro
  • Hunter Carlson liked Fiddler
  • Proxygen icon
    kiira-carvajal added Fiddler as alternative to Proxygen
  • TBayAreaPat replied to a comment / review on Fiddler
  • TBayAreaPat commented on Fiddler

    "Fiddler Classic is free, while Fiddler Everywhere is a separate product with a free 10-day trial and paid licensing afterward.. Fiddler Classic is not in active development and comes with no commitments for releases, patches, or tech support"

Comments and Reviews

   
Top Positive Comment
eyal0
4

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
9

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

TBayAreaPat
Replying to @Confusius

Progress Software, headquartered in Burlington, Massachusetts, is the larger software company that acquired Telerik in 2014.

TBayAreaPat
0

"Fiddler Classic is free, while Fiddler Everywhere is a separate product with a free 10-day trial and paid licensing afterward.. Fiddler Classic is not in active development and comes with no commitments for releases, patches, or tech support"

GanderPL
0

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

Review from a new or low-activity account — shown here, but not counted in the app rating.
Femo Bayani
1

Free and has a ton of features

steel30
0

best http rewrite tool for windows

Review from a new or low-activity account — shown here, but not counted in the app rating.
kilvaiden
1

great for sniffing http(s) requests

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Official Links

Install from the command line

  • winget install -e --id Telerik.Fiddler.Classic

Be careful what you paste into a terminal. Check what a command installs before running it.

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.

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 3.8

  • Alternatives

    56 alternatives listed

  • Badge

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  • Supported Languages

    • English

AlternativeTo Categories

Network & Admin, Development

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Our users have written 7 comments and reviews about Fiddler, and it has gotten 208 likes

Fiddler was added to AlternativeTo by Ola Johansson on and this page was last updated .