DockDoor is a macOS utility that adds window peeking and enhanced alt-tab switching functionality to the operating system.
The tool addresses the lack of context when multiple windows from the same application are open in macOS. It solves this by displaying window previews when hovering over Dock icons, allowing users to visualize and switch between open windows without opening the application. The implementation includes alt-tab switching enhancements and cmd-tab improvements, with configurable preview layouts that users can customize to their preference.
DockDoor Free is entirely open-source with no paywall and no planned paywall. It suits macOS users who frequently work with multiple windows per application and want quick visual access to those windows without cluttering their interface. The tool is designed to feel like a native macOS extension rather than a third-party addition. A separate paid product called DockDoor Pro exists for users wanting more extensive system control, including a full Dock replacement with live previews, spring magnification, folder fan-out, and a widget marketplace, but all features in the free version remain permanently free.
The project maintains active development with regular updates and bug fixes. The codebase is written in Swift and built with Xcode, reflecting a focus on native macOS integration and performance. The tool is distributed as a standalone application with straightforward installation via a disk image file.
