Fiddle the web with Fiddler

About Fiddler:
Fiddler is a very handy and powerful tool in web debugging, analyzing and troubleshooting. I was able to resolve many of the MOSS issues within minutes which otherwise would have taken lot of effort and time. Thanks to my friend in Microsoft who recommended me to use Fiddler.

Although, I used Fiddler heavily for MOSS, Fiddler can used with any web page regardless of the web technology used. So you can use it with ASP.NET or JSP site the same way.


Fiddler is available at:

http://www.fiddler2.com/fiddler2/version.asp
 
Once you install fiddler, it is very easy to start your debugging. Videos and demos can be found at above site.

Uses of Fiddler:
1. To measure performance of the web page on client browser:

Fiddler trace gives you analysis of every single element downloaded and loaded on the web page. So it is very easy to Pin Point the heavy-weights on your page. Fiddler gives a nice graph for this. You can easily figure out which image or script is taking a lot of time.

2. To debug:

Fiddler gives facilities to view the HTTP form and script parameter. With this you can easily debug errors on the web page. For example, you can trace down a wrong value sent during HTTP Postback, view and resolve missing images at client end, common 404-Page Not Found errors, hard-to-trace wrong redirect from MOSS web part etc.