the UI of the application is the greatest strength. Its make things easier for one to intercept a given request/response, manipulate with the parameters and send it. You also get to see the data in over 8 different forms under Inspector tool..Sometimes there’s a certain task that you need to undertake when debugging HTTP traffic that you can’t do with out of the box features of Fiddler. Fiddler has a huge range of tools that you can try, but for this example we’ll assume you have found one unique use case that you can’t fulfil with the base implementation of Fiddler.
Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and “fiddle” with incoming or outgoing data. Fiddler includes a powerful event-based scripting subsystem, and can be extended using any .NET language.
Fiddler is freeware and can debug traffic from virtually any application, including Internet Explorer, Mozilla Firefox, Opera, and thousands more.