AltSnap

AltSnap is a tool designed for manipulating windows on Windows operating systems. It makes moving, resizing, and managing windows easy using key combinations and mouse dragging. It is an alternative to the system's native features, with more customization and advanced options.

★★★★★

5.0(1 ratings)

• Moving windows with Alt + left click. Lets you drag any window by holding down the Alt key and the left mouse button. There is no need to click on the title bar, and it works even on borderless windows.
• Resizing with Alt + right click. Activates window resizing without having to locate the border. While holding Alt and the right mouse button, you can adjust the dimensions from any point of the window.
• Snapping to screen edges. When a window is moved near the edge of the screen, it is aligned automatically. Supports custom settings for snapping distances.
• Transparency with Alt + mouse wheel. Changes the opacity of the window under the cursor by scrolling the mouse wheel while holding the configured modifier key. Useful for seeing content behind the current window.
• Maximize or minimize actions. Optional settings let you maximize, minimize, or close windows using configurable mouse actions, such as a double click on the title bar.
• Multiple monitor support. Manages windows in setups with several displays. Lets you move windows between monitors with customizable shortcuts.
• Always-on-top mode. Pins a window above all others until it is manually disabled. Keeps the window in the foreground regardless of focus.
• Configurable keyboard shortcuts. All main functions have editable key combinations. Different actions can be assigned according to the user's preferences.
• Application exclusion. Blacklist and whitelist options to define which programs to ignore. Prevents accidental activation in software that should not be modified.
• Custom per-window rules. Sets different behaviors depending on the window title or class. Applies default transparency, position, or size.
• Command-line interface. Advanced control through CLI parameters. Allows integration with scripts or external launchers.

AltSnap was originally created by Stefan Sundin as AltDrag. The first version of AltDrag appeared in 2009, with regular updates until 2018. Later, RamonUnch continued development under the name AltSnap after the original project became inactive. The program is written in C++ and uses Windows system hooks to intercept input events. AltSnap maintains compatibility with modern versions of Windows while adding new features. The source code is available under the GPL license on GitHub.

Alternatives to AltSnap:

For AltSnap there are 3 alternative programs. Free: 1, paid: 2.

WindowTop

WindowTop is a Windows utility that keeps any window always on top, controls opacity, enables interactive Picture-in-Picture mode, forces dark mode on unsupported windows, crops window regions, and manages multiple windows using an anchor system.

Price: Free   Size: 25.9 MB   Version: 5.32.6   OS: Windows

Fenestrae

Fenestrae is software for Windows 11 that solves two common problems in multi-monitor setups: windows scattering whenever the display configuration changes, and the tedious manual alignment of windows.

Price: $20   Size: 45.2 MB   Version: 1.0   OS: Windows

Windownaut

Windownaut is a macOS utility that allows you to control the position and size of windows using keyboard combinations and hot zones on the screen.

Price: $4.99   Size: 4.8 MB   Version: 1.2.6   OS: MacOS