Only the active window
The focused window stays bright. Every other window dims — including other windows of the same app.
One window bright.
Everything else, dimmed.
Dimm is a tiny native menu bar app that keeps the window you are working in bright and quietly dims every window behind it — so your eyes always know where to look.
Stays bright. Everything behind it fades back.
Less on screen. More in focus.
One small settings window, no rules to configure. Dimm does one thing.
One slider
Pick how dark the background gets, right from the menu bar. The change is live while you drag.
Wallpaper mode
Prefer calm over dark? Show only the active window on top of your own wallpaper — every other window disappears.
Every display
All screens dim together, so a second monitor never pulls your attention away.
Instant switching
Click another window and it lights up immediately. No fades, no lag.
Launch at login
One menu item and Dimm is ready the moment you sign in.
Automatic updates
Built-in updates via Sparkle: new versions are checked in the background.
Up and running in a minute.
No window. No dock icon. Just a quiet helper in your menu bar.
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1
Download & open
Drag Dimm into your Applications folder and launch it. It tucks itself into the menu bar.
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2
Grant Accessibility
Allow Accessibility access once so Dimm can see which window is active.
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3
Just work
Switch windows as you always do. The one you are in stays bright.