Fiddler - HTTP(S) traffic recorder.

Fiddler - HTTP(S) traffic recorder.

 

Link to Fiddler

You can use this application to understand browser request and server response. Fiddler is a freeware and can debug traffic from any application. Author has provided video tutorials on different features available on this tool. Most of the performance testing tools use similar methodology for creating performance testing scripts.

I suggest every one (especially performance testing engineers) to use this application to understand request and response at root level.  

If your application is https, enable https option.

Attaching Fiddler screen shots.

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