DockDoor

Free, open-source Mac utility that adds window previews to the Dock and a per-window Alt+Tab switcher.

Verified facts: 5 of 5
Alternatives ranked: 4
Approved reviews: 0
Visits sent from here: 0

About DockDoor

DockDoor fills a gap Windows users notice right away on a Mac: hover over an app in the Dock and it shows thumbnails of every open window, including ones that are minimized, hidden or on other Spaces and displays. From a preview you can bring a window forward, close it, minimize it or quit the app. It also adds an Option-Tab switcher that cycles through individual windows rather than whole apps, with type-to-search, plus window previews layered over the built-in Command-Tab switcher. Optional extras include trackpad gestures for snapping windows to halves and corners, folder previews in the Dock, and a music-player widget. Everything can be tuned in Settings, from hover delay to preview size and style. DockDoor is a native macOS app for macOS 13 and later on both Apple silicon and Intel. It is entirely free and open source under GPL-3.0, funded by donations and by a separate paid app, DockDoor Pro, which replaces the Dock outright. It has no analytics or crash reporting, but it does need Accessibility and Screen Recording permissions to see and capture windows.

Best for: Mac users coming from Windows who want taskbar-style window previews and a window-level Alt+Tab.

What works

Every feature is free, with no trial or paywall
Shows minimized windows and windows on other Spaces and displays
Window switcher works per window, with search
No analytics, telemetry or crash reporting

Why people leave

Needs Accessibility and Screen Recording permissions
macOS only, and requires macOS 13 or later
Apps built on unusual UI frameworks may show fewer windows
Mostly maintained by a single developer

Top DockDoor alternatives

See all 4

1
AltTab
Free and open source, focused purely on a Windows-style window switcher with thumbnails if Dock previews aren't needed.
66.5
2
Rectangle
Free, open-source window snapping with keyboard shortcuts, if snapping matters more than previews.
59.6
3
Raycast
Its window-switching and window-management commands cover jumping to a specific window from the keyboard.
52.2
4
BetterTouchTool
Paid all-rounder for gestures, window snapping and custom shortcuts, with far more ways to control windows.
48.9

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DockDoor: common questions

Is DockDoor free?

Yes. DockDoor is free, open-source software.

Is DockDoor open source?

Yes. The source code is on GitHub at ejbills/DockDoor.

What platforms does DockDoor run on?

DockDoor is available for macOS.

What are the best alternatives to DockDoor?

The highest-ranked DockDoor alternatives right now are AltTab, Rectangle and Raycast. See the full ranked list for pricing, platforms and verified facts.

See all 4 DockDoor alternatives

DockDoor facts

5 of 5 verified

Price: Free, no paywall; Checked Oct 25, 2026dockdoor.net(opens source in a new tab); “Every feature is free, with no trial, no subscription and no paywall.”
License: GPL-3.0; Checked Oct 25, 2026dockdoor.net(opens source in a new tab); “The whole app is open source under GPL-3.0.”
Platforms: macOS 13+, Apple silicon and Intel; Checked Oct 25, 2026dockdoor.net(opens source in a new tab); “Download for Mac brew install --cask dockdoor Free for macOS 13 Ventura and later, on Apple silicon and Intel.”
Analytics: None; Checked Oct 25, 2026dockdoor.net(opens source in a new tab); “There are no analytics, no usage tracking and no crash reporters.”
Install via Homebrew: Yes; Checked Oct 25, 2026dockdoor.net(opens source in a new tab); “Download for Mac brew install --cask dockdoor Free for macOS 13 Ventura and later, on Apple silicon and Intel.”