I am not entirely certain of the requirement. Generally, Fiddler is meant to be used as a Debugging tool.
In order to achieve something like this, I recommend altering the source code of the website. For example, a web application could be integrated with Fiddler Core that might produce the desired results.
I hope this helps. Please let me know if you need any additional information.
Eric R | Technical Support Engineer
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items