Kevin Thompson

504 error downloading Fiddler 4

I am getting a 504 gateway error when attempting to download Fiddler 4. Anything with a URL from is returning the 504 error. Any help would be appreciated.
Problem by Kevin Thompson Status: New Comments: 0 Last update: 2015-10-01T13:18:46 by Kevin Thompson
Jacobus Terhorst

Can you make Fiddler 4 available as normal download? Not via, which is blocked?

Can you make Fiddler 4 available as normal download? Not via, which is blocked?
Problem by Jacobus Terhorst Status: New Comments: 1 Last update: 2015-10-01T13:14:27 by Kevin Thompson
Илья Шипицин

fiddler breaks rdp over rdp gateway

when using rdp over rdp gateway, it does not with fiddler enabled
Problem by Илья Шипицин Status: New Comments: 0 Last update: 2015-09-15T14:06:22 by Илья Шипицин
Arnt Witteveen

Easily filter out certain applications when starting

On my computer, 2 'monitoring' programs monitor a build machine each (CruiseControl Jenkins). The non-stop traffic from these 2 is easily hidden by right clicking them and choosing "Filter Now" -> "Hide 'cctray:*'" and the same for the other one. I was looking for a way to make this a 'default', but I don't seem to be able to. It would be nice to have the option of saving this 'Filter Now' filter when Fiddler closes. (Or any other way to always filter those 2 processes when I start fiddler.)
I have looked for this functionality in the Filters, but excluding certain processes doesn't seem to be possible there.
Feature Request by Arnt Witteveen Status: New Comments: 0 Last update: 2015-09-08T14:20:25 by Arnt Witteveen
Naphtali Gilead

hosts fail to redirect if uppercase is used

Trying to redirect using the Tools --> HOSTS... feature, but trying a domain that uses Uppercase in its name fails.

Then test using:
// Not working
curl --url --get --verbose --proxy
// Working
curl --url --get --verbose --proxy
Problem by Naphtali Gilead Status: New Comments: 0 Last update: 2015-08-18T16:03:05 by Naphtali Gilead
Kernel Leak

Fiddlerhook Extension for Firefox needs to be signed

Firefox 40 warns that the FiddlerHook extension installed by Fiddler is not signed, and from Firefox 42 onwards it will not even load it.
Feature Request by Kernel Leak Status: New Comments: 0 Last update: 2015-08-13T06:58:21 by Kernel Leak
John McDonnell

Please support higher density screens

Because of the density of my screen, I have to run at 200% scaling, making Fiddler which does not support this look terrible.

Problem by John McDonnell Status: New Comments: 0 Attachments: 1 Last update: 2015-07-31T15:07:13 by John McDonnell
Bob Salita

Transparent HTTP and HTTPS

Implement transparent proxy so that I can just point the router's gateway at the Fiddler system to enable Fiddler to see remote traffic without having to change client proxy settings. Sure, I can use mitmproxy or squid but I prefer the Windows + C# + .Net experience.
Feature Request by Bob Salita Status: New Comments: 0 Last update: 2015-07-16T06:03:37 by Bob Salita
Emily Malbon

Could not load file or assembly

I'm having trouble running the Fiddler executable on a certain machine. This is a Terminal Server profile and therefore I'm wondering if it's permissions related. I've tried both the Fiddler2 and Fiddler4 installation, with uninstall/reinstall. I've tried running as administrator. The file referenced "Xceed.Zip.v5.4" is present as a dll in the folder.

I noticed that I didn't have a "Temporary ASP.NET Files" folder in Windows\Microsoft.NET\Framework\v2.0.50727, so I created one manually, but that was just a long shot.

Any ideas?

Awww, Fiddlesticks!
Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report using the Help | Send Feedback menu.

Could not load file or assembly 'Xceed.Zip.v5.4, Version=5.4.13572.13590, Culture=neutral, PublicKeyToken=ba83ff368b7563c6' or one of its dependencies. The system cannot find the file specified.

Type: System.IO.FileNotFoundException
Source: Fiddler
at Fiddler.FiddlerApplication._SetXceedLicenseKeys()

at Fiddler.frmViewer.RunMain(String[] arrArgs)

at Fiddler.frmViewer.Main(String[] arrArgs)

Fiddler v4.5.1.2 (x64 AMD64) [.NET 4.0.30319.18444 on Microsoft Windows NT 6.1.7601 Service Pack 1]
Problem by Emily Malbon Status: New Comments: 0 Last update: 2015-07-15T09:44:33 by Emily Malbon
Ronen Zilberman

show an "Are you Sure?" popup when closing fiddler and when pressing Ctrl+X to stop accidental deletion of work

As you can imaging, this just happened...

It's too easy to lose a lot of work with a careless click or keystroke.
Additionally, there can be an override in the Options.
Feature Request by Ronen Zilberman Status: New Comments: 0 Last update: 2015-06-25T19:32:13 by Ronen Zilberman
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