Hi, i get this error on any site any browser, 

when i looked at the certificate list, i see that the certificate is expired:

 

i just reinstalled the last version, but the problem persists

is there any way to fix that ?

I have a C# rule script in fiddler classic, which convert the http request form-data body from "key1=value1" to json {"key1": "value1"}

I am trying to migrate to fiddler everywhere, but I have no idea how to achieve this in fiddler everywhere, where's rule script in fiddler everywhere?

Hello

I am currently trying to track any traffic of the game client, but for whatever reason it does not seem to pick up any of it.
All I have found so far was another Thread on this Forum which could not provide the details I need to get the information that I require.

According to the thread the client does not use the windows default proxy.. so what can I do in order to track the traffic?

Any help is appreciated.

~ Dinh

 

 

I have a simple problem and hopefully it has a simple solution. I want to limit the speed for an online game, namely Roblox. I edited the line under if (m_SimulateModem), which works great for webpages, but it didn't slow down the game. Is it possible to limit the speed for online games using Fiddler? I believe Roblox uses UDP for communication, so can I edit something to slow UDP communications?

I am trying to capture the traffic while launching Bloons TD 1 but it doesn't appear on fiddler

Hello so as you have seen my subject question is there a way that i could for example in league of legends add myself blue essensce and things like that?

I'd like someone to help to resolve the issue about proxy setting in Windows10.

Fiddler Version: Progress Telerik Fiddler Classic v5.0.20211.51073
Client PC: Windows 10

I installed "Fiddler Classic v5" into about 300 client PCs (Windows10).
When Fiddler is running in PC, everything is going OK.
Howerver, when Fiddler is disabled/stopped then enabled/started, the proxy setting in PC might have been gone.
I'm wondering if there might be some bugs in Fiddler?

I'd really appreciate it if someone would help to answer this!

Regards,
Yamato

Fiddler classic doesn't capture anything because there's a security software in my case that always changes the proxy setting if I change it for Fiddler.

Fiddler Anywhere feels like a hack. It's only good for capturing when launching a browser from within it.
There's no functionality to capture http requests that come out from apps running on the machine. No capturing from apps that host browsers like webview.

Please make a tool that can capture requests from any app. See httpdebugger.com as an example. The tool need not depend on a proxy.

I am trying v5.0.20253.3311 for .NET 4.6.2.

When [File]-[Save]-[All Sessions] and input filename of Session Archive(*.saz) and [Save], 

I see the following dialog: 

Failed to save Session Archive. Could not load file or assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.

Please let me know how to solve this problem.

Receiving this error: 

[2025-09-25 16:50:27:054] [Error] [Fiddler] !SecureClientPipeDirect failed: Org.BouncyCastle.Tls.TlsFatalAlertReceived illegal_parameter(47) for pipe (CN=*.facebook.com, O=Progress Telerik Fiddler, OU=Created by http://www.fiddler2.com)