Fiddler Web Debugging Proxy
Fiddler is free Web Debugging Proxy tool. Fiddler logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect traffic, set breakpoints, and fiddle with incoming or outgoing data. It supports a proxy, including Internet Explorer, Google Chrome, Apple Safari, Mozilla Firefox, Opera and it also debug traffic from popular devices like Windows Phone, iPod/iPad.