AltSnap

At a glance

• Editor score
  6.0 / 10
• Pricing
  Free plan
• Best for
  Windows users wanting free mouse-driven snapping
• Free plan
  Yes
• Paid from
  Free
• Layout presets
  Yes
• Facts checked
  19 Sep 2026

• Where it wins

  • Move or resize windows with Alt-click instead of precise border targeting.
  • Save custom snap layouts and use Aero-style edge and corner snapping.
  • Supports multiple monitors and Microsoft PowerToys FancyZones integration.

• Where it doesn't

  • Windows only; it does not serve macOS or Linux users.
  • Configuration options and blacklists may be more than basic snapping requires.
  • Does not provide documented virtual-desktop controls or app placement rules.

Our verdict on AltSnap

AltSnap is an open-source Windows utility for moving, resizing, and snapping windows with mouse and keyboard actions. It is aimed at Windows users who want more direct control over window placement without carefully targeting title bars or borders. The basic interaction uses Alt+left-click to move a window and Alt+right-click to resize it, while Aero-style edge and corner snapping and saved custom layouts cover repeat placement needs. Its free, open-source distribution suits people seeking a utility rather than a paid window-management suite.

AltSnap’s feature set reaches beyond basic snapping: users can configure mouse actions, apply transparency while moving or resizing, and manage window blacklists and application-specific exceptions. It supports multiple monitors and integrates with Microsoft PowerToys FancyZones, which makes it a fit for users who already organize windows with that tool. Portable releases are also available. The combination favors users willing to tune behavior, rather than those looking only for a minimal snap toggle.

The main trade-off is platform and scope. AltSnap is for Windows, and its documented capabilities center on mouse-driven movement, resizing, snapping, and layouts. It is not a fit for someone looking for macOS or Linux support, or who needs documented virtual-desktop controls or application placement rules. Choose it for configurable mouse control and saved layouts at no cost; choose another option if those undocumented workflow controls or cross-platform coverage are essential.

Your product? Our editors can test AltSnap in depth and publish a review, labelled as paid · from $149/mo →

AltSnap pricing

AltSnap fact sheet

AltSnap integrations

AltSnap lists 1 integrations on its own site.

• Microsoft PowerToys FancyZones

Alternatives to AltSnap

• i3A configurable X11 window manager for Linux users who want precise tiling and workspace control.9.4
• SwayA free, open-source Wayland compositor for configurable window layouts and i3 users.9.3
• HyprlandA flexible Linux building block for users who want to configure their own desktop.9.2

See all AltSnap alternatives →

Featured on iTechGuides

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update