I've been using Fiddler for a long time (from v1 days) and have had many versions installed. Today, there was an update and during update it stopped saying that it couldn't uninstall the existing version from C:\Program Files (x86)\Fiddler2 and aborted. So, I tried to manually uninstall from Windows 10 Add/Remove as well as by going to the mentioned folder. Fiddler is not present in either (there's no Fiddler2 folder at in Program files folder).

So, I tried the following:

1. Downloaded and installed Fiddler to C:\Program files...

2. Installing to default App Data path

3. Deleting all references to Fiddler from registry and installing

Regardless of what I do, the error when running Fiddler is the same:
---------------------------
Machine-wide installation has been found. Progress Telerik Fiddler is closing now.
---------------------------
Machine-wide Progress Telerik Fiddler installation has been found at C:\Program Files (x86)\Fiddler2\ . Please, use that one or uninstall it before starting the per user Fiddler installation.

 

How do I get around this?

Hi, I'm using Cisco AnyConnect secure mobile client ver. 4.8.00175 on macOS Catalina 10.15.3 to access the Kibana service for Client project. without AnyConnect we cant access Kibana.
I've to capture some network requests from the kibana using Fiddler tools for debugging purposes. but when I start AnyConnect Secure Mobile client Fiddler doesn't work or capture any network traffic and if I stop AnyConnect both Fiddler starts capturing network requests.
Could you please guide me on how to solve this problem it's really urgent.

Thanks.

I'm using Fiddler for Mac on macOS Catalina 10.15.3. I want to capture logs from Kibana running in Google Chrome and to access Kibana i connect vpn using Cisco AnyConnect. but only if i disconnect from VPN fiddler capture network request and if i connect to VPN using Cisco AnyConnect Fiddler doesnt capture any network request from browser.

How do the header values automatically enter the TextView? The header value is random ...  like the example image below

https://i.ibb.co/HtMBPSk/Capture.png

Hi, Ive used Fiddler web debugger to extract information from a website. Ive done it multiple times with success.

(note the website is FLASH)

However today it (the website) just "stops".  Fiddler seems to be going, ive checked my firewall (zonealarm) and Fiddler has the green-light to proceed.

 

if i use the website WITHOUT Fiddler - it works OK, no problems..  But when i try turning fiddler ON, the website stops going. *NO* errors, or warnings or anything..  it just stops.. - it looks like a 'waiting' sign - waiting for the server to respond..   BUT - after 5, 10 minutes, its still waiting..  

If i stop fiddler & refresh the website - It loads up within 1-2 seconds... 

 

Progress Telerik Fiddler Web Debugger

v5.0.20202.18177 for .NET 4.6.1
Built: Tuesday, April 14, 2020

64-bit AMD64, VM: 117.0mb, WS: 161.0mb
.NET 4.8 WinNT 10.0.18362.0

You've run Progress Telerik Fiddler: 122 times.

Running on: new1ab:8888
Listening to: All Adapters
Gateway: No Gateway

Copyright ©2003-2020 Progress Software Corporation. All rights reserved.

 

 

Every time Fiddler encounters a certificate error it prompts me on whether to ignore the error and proceed or not.

I know I can go into Tools --> Options --> HTTPS --> and check Ignore Server Certificate errors (unsafe) - but that is the opposite of what I want to do.

 

I want to NOT proceed for all certificate errors without being prompted. Is there a way to accomplish this?

For various reasons in our environment I encounter a lot of certificate errors and I never want to proceed on them and clicking "No" through dozens of ignore certificate error? is tiresome.

         I developed a fiddler extensions to decrypt the response,but if i changed a response when in the process of debugging,clicked the  button of "run to Completion",the app client still received the unchanged response.

         In the code ,I implemented three Interceptors, Inspector2, IResponseInspector2 and  IBaseInspector2,but I found that when I click the "run to Completion",my program still on the breakpoint and the App has received the response.

         I also fund a problem，when  i return a fixed response in the code,and debug it in fiddler  ,if i didn't change the response ,the app received the fixed return.but if I changed the response ，the APP received the original response.

         So how to catch the response before the app received it after clicked the button of "run to Completion" and make it works.hope somebody can help me,thanks very much.

Hello,

I recently installed Fiddler on my Windows 10 Machine to trace the networking requests of my ASP.Net application.
I enabled HTTPS decryption and allowed trusted certs as prompted.

 

The problem - 

It worked fine, however, Visual studio is now unable to access the internet. More specifically, I get this error [nuget.org] Unable to load the service index for source https://api.nuget.org/v3/index.json.
  The ServicePointManager does not support proxies with the https scheme.
I have tried all of the solutions posted here - https://github.com/NuGet/Home/issues/2880 and here - https://github.com/NuGet/Home/issues/5358

This is not a Visual Studio issue because it has only started to happen when I installed Fiddler.
I have spent about 3 days trying to resolve it.I have tried to undo all of the Fiddler settings, uninstalling it, even uninstalled and installed Visual Studio.
In some random patterns, when I open VS and open Fiddler then I try to restore packages it will work, but only if I open Fiddler. This however does not work majority of the time.

The feature I use and change most often is the Tools--> HOSTS... window for Host Remapping. However the popup dialog window is unfortunately very small, doesn't remember its new size when resizing, and closes itself on save. Further the ctrl-arrow-key movement prefers bigger jumps. 

Is it possible to create an extension that affects this window's default size?
Is it possible to edit/save the contents of the window from another app such as Notepad++?

I've sadly been unable to find much of anything relating to it in the extension creation documentation.

Thanks

Hello, im new here I just wanted to save a specific file with FiddlerScript but it seems not working what did I do wrong ?