What is Fiddler?
Fiddler is a HTTP Debugging Proxy which logs all HTTP traffic between your computer and the Internet. Fiddler allows you to
inspect all HTTP 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.
Visit the Fiddler Download Page...

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