Fiddler Ideas

When debugging or test web applications it can be useful to increase latency or decrease bandwidth to see how your application works with poor network connections. The modem simulation rule option will do this for bandwidth but latency is more dif...

I accept your update and get to the install part and Windows 10 tells me that the update has an invalid certificate (or something).

ShellExecute("Fiddler") no longer works because Fiddler is no longer registered in the APP PATHS registry key. This breaks a 14-year-old mechanism of launching Fiddler. Incidentally, It appears that Fiddler now installs on a per-user basis /by de...

Please honor the option to disable capture. I use fiddler to test API development and I never want it to capture any other traffic. The configuration option to disable this doesn't work, please fix.

I use McAfee Web Gateway proxies that only support Kerberos authentication. When trying to use these devices as an upstream proxy fiddler first tries NTLMSSP and then NTLMSSP2 and then prompts for credentials. It never tries Kerberos in the reques...

I develop a lot of extensions for Fiddler. Some of them are public, others are private to my organization. Currently Fiddler4 is built against the .NET Framework 4.0. I don't want my extensions to depend on a different version of the .NET Framewor...

Ensure that traffic from the Brave web browser is properly categorized by the traffic filtering system in the status bar.

Click on a request or response that has Content-Type: application/reports+json EXPECT: JSON tab activates (e.g. scores this as if it were content-type: application/json The XML Inspectors should do the same for content-types ending in ...

Text is misleading if "Perform decryption" is selected. Text is only correct in case "Skip decryption"

Not sure if this is a recent change, but I use Microsoft Outlook and Skype, and both are having connectivity issues when Fiddler is running. Also Windows 10 apps seem to be unable to have an internet connection as well.