Fiddler

The free web debugging proxy for any browser, system or platform.
Fiddler web debugging proxy helps you record, inspect and debug traffic from any browser. Debug web traffic from any Windows-based PC, Mac or Linux system and mobile devices alike. Fiddler is here to help, no matter what platform or language you use to develop.

• Web Debugging
• Performance Testing
• HTTP/HTTPS Traffic Recording
• Web Session Manipulation
• Security Testing
• Customizing Fiddler