OPEN-SOURCE PICK · FREE
AltTab for Mac
Alt-tab with window previews
- Window management
- Keyboard & mouse
- Open source · GPL-3.0
- Free
- ★ 16.4k on GitHub
AltTab is a free, open-source app switcher that brings Windows-style alt-tab to the Mac. See a preview of every open window, not just every app, and jump to the one you want.
Key features
EVERY WINDOW, NOT EVERY APP
Switch between individual windows with thumbnails.
CUSTOMIZABLE SHORTCUTS
Choose the keys and how the switcher looks.
FEELS FAMILIAR
A natural fit for people coming from Windows.
Who AltTab is for
- People switching from Windows
- Anyone with many windows of the same app
- Keyboard-first users
Install
With Homebrew:
Or use the Download button above and drag the app to your Applications folder.
Requirements: Homebrew lists macOS 12 or later.
A free alternative to Witch and Command-Tab
People often look for AltTab when they want what Witch or Command-Tab does without paying. AltTab is free and its source code is public, so you can see exactly what it does on your Mac.
FAQ
Is AltTab free?
Yes, free and open source under GPL-3.0.
How do I install it?
Download from alt-tab.app or run brew install --cask alt-tab.
AltTab is made by lwouis, not by OneClickTool. We list it because we use it and recommend it; we are not paid to. Details checked against its README on 2026-10-07.