Getting to Know Web Inspector

Web Inspector is a powerful tool for understanding the behavior of your web site. Gain an overview of everything Web Inspector can do. Explore the user interface and learn about features that will make your life easier. Learn how to connect the Safari Web Inspector to your iPhone or iPad for on-device testing. Find out how to inspect, tweak, optimize, and debug the web content in your web, Mac, or iOS app.

WWDC 2013 - Session 601 - iOS, macOS