Window Cannon
A ball physically rolls off one monitor and flies across the gap onto your second screen — because the page knows your real display layout.
Drag to aim & fling the ball. It rolls across the gap into the other window. Keep this window open.
A comet trail behind the ball. Auto-disabled when your system prefers reduced motion.
🪟 One ball, many windows
A single physics simulation lives in virtual-desktop coordinates. Each window draws only the slice of that world it sits over. Open a second window and watch the same ball roll off this screen and reappear in the other — across the gap between your monitors.
100% on-device — no servers, no uploads. Windows talk over BroadcastChannel. Multi-monitor positioning works best in desktop Chrome / Edge with the Window Management permission.
Why you’ll love Window Cannon
Instant & free
No signup, no paywall, no limits — Window Cannon works the moment the page loads.
Completely private
Everything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any device
Fully responsive and touch-friendly — use it on your phone, tablet or desktop.
Endlessly playable
Designed to make you lose track of time — and come back for more.
How to use it
Open it
No download and no login — the tool is ready right at the top of this page.
Use it
Enter your details or start interacting. Everything updates live as you go.
Get your result
Copy, download or share your result in a single tap. That’s it.
Frequently asked questions
Window Cannon is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
Never. Just open it and play — no signup, no installs, nothing to lose.
Completely. Window Cannon runs entirely in your browser (client-side). Nothing you type, upload or generate is sent to our servers, so your data never leaves your device.
No. It works instantly in any modern web browser — Chrome, Safari, Edge or Firefox — on desktop and mobile. You can even install this site as an app.
Yes. The tool is fully responsive and touch-friendly, so it works great on phones and tablets as well as computers.
Workaholic Developers — a software & AI studio. We built Window Cannon (and 200+ other free tools) to show what we can do. Need something custom built? We’d love to help.
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We built this. We can build yours.
Window Cannon is one of 200+ free tools from Workaholic Developers — a software & AI studio. Need a website, app, AI agent or automation? Let’s talk.
🇮🇳 Built by Workaholic Developers
We built this little toy in days. Imagine what we’ll build for you.
AI agents, web apps, automation, custom tools — designed and engineered fast, on whatever tech fits the job. If you can describe it, we can build it.