A quiet button with one job
Captain Kill Switch exists for one moment: when you need a clean slate, now. No Alt-Tab, no Cmd-Q marathon — just one calm, decisive click.
Built to clear the chaos
We kept finding ourselves juggling a dozen open apps, losing focus, and spending real time closing them one window at a time. We wanted a single, deliberate way to reset and refocus.
So we built Captain Kill Switch — a cross-platform menu-bar app that closes every running application with one click. It asks your apps to quit gracefully first, leaves critical system processes alone, and gets out of the way until you need it again.
It is free, runs 100% on your machine, and needs no account. It sends anonymous usage statistics and crash reports — nothing personal, ever — so we can keep improving it. macOS builds are Developer-ID signed and notarised. That is the whole product — and the whole promise.
One job, done extremely well
Instant, one-click reset
Close every open application in milliseconds, straight from the menu bar. No hunting through windows, no Alt-Tab cycling.
Protects what matters
It closes your apps while leaving critical system processes untouched — and runs entirely on your machine, with no account and only anonymous usage stats.
Truly cross-platform
The same calm, single-button experience on macOS, Windows, and Linux. Learn it once, use it everywhere.
Three seconds to a clean desktop
Install & forget
Download for your OS and open it once. It tucks itself into the menu bar or system tray automatically.
Hit the button
When you need a fresh start, click the tray icon or press your global hotkey. One action — that is the whole interface.
Clean slate
Every app closes at once, leaving a quiet, empty desktop ready for whatever is next.
One button between you
and a clean slate
Free for macOS, Windows, and Linux. Install it in under a minute.