If you need to view and analyze all of the HTTP traffic between a web browser or any program that uses the HTTP protocol and the web server, then HTTP Debugger is the program for you.

Web developers can view and analyze HTTP header parameter values, cookies, query strings, the source code of HTML/XML web pages and Java/VB scripts, error codes etc. They can measure the size and downloading time of their web pages and identify web site performance bottlenecks.
You can improve your web programming skills by viewing and analyzing how other web sites work and how they implement certain features.
Software developers can view and analyze the HTTP traffic of their own or any third party software program and the Internet, irrespective of whether this program is a user mode application or works as a Windows NT Service.
System and network administrators can analyze the behavior of suspicious web sites and view what information programs have sent from your computer to their owners (for example, during a registration or update procedure).