Dear Web Developers,

”Really, you need to read this article”

I worked for many web based applications and faced debugging problems after deploying or publish the application to hosting server.

also you can use it for the development environment.

some issues: To trace and debug the following:

- Sessions
- Cookies
- Security
- Authentication
- Request Statistics (count-bytes sent-bytes received) 
- Encrypted Query strings
- Web Site Traffic
- Editing CSS file on fly
- Encoding and decoding with many algorithms
- …etc

Try to find quick start video at www.fiddler2.com

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.

For documentation and more information  http://www.fiddler2.com/fiddler2/

For download    http://www.fiddler2.com/fiddler2/version.asp

For Developers   http://www.fiddler2.com/Fiddler/dev/

I hope it is helpful.!