Fiddler – a HTTP debug proxy

I saw this on Scott Water’s blog: A HTTP debugging proxy called Fiddler, that sets itself up as a default system proxy and enables you to see every little detail about every request sent and response recieved to your computer, as well as intercept requests/responses and ”fiddle” with them. Great for troubleshooting and a bunch of other stuff as well. I’ve been holding on to a copy of Steve Genusa’s TelHTTP to be able to inspect headers and similar stuff from random webservers, but this does all that TelHTTP ever did, and so much more.

Works with IE, and Mozilla too, if you configure it to use localhost:8888 as it’s proxy.