Fiddler allows you to inspect 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 that supports a proxy, including Internet Explorer, Google Chrome, Apple Safari, Mozilla Firefox, Opera, and thousands more. You can also debug traffic from popular devices like Windows Phone, iPod/iPad, and others.

What's New:

  • Add Packet Capture Import
  • Enhanced Composer
  • Enhanced AutoResponder
  • Enhanced Protocol Violation detection
  • Improved WebView
  • Add registry-fallback to EnableLoopback