Window Cannon

Window Cannon is a browser-based toy that demonstrates dual screen physics in action. If you have a multi-monitor setup, launch the tool and watch as a ball physically rolls off one monitor and flies across the gap onto your second screen. The page automatically detects your real display layout using the Window Management API, calculating exactly where your screens meet so the ball transitions smoothly between them.

This cross screen ball demo showcases the practical capabilities of modern web APIs. It's a free window management API demo that runs entirely in your browser—no installation, no signup required. Your data never leaves your device, since all the physics calculations and screen detection happen locally. It's perfect for exploring how web technology can interact with your hardware configuration in ways that were previously impossible.

The physics engine smoothly animates the ball's journey as it leaves one display and enters another, creating an intuitive visualization of how your monitors are positioned. This toy is best experienced on a dual or multi-monitor setup, but even single-screen users can appreciate the underlying technical demonstration of the Window Management API in action.