Rectangle
Open-source Mac window snapping. Half-screen layouts without a Magnet subscription.
Quick facts
- Price model
- Open source
- Starting price
- Free
- Best for
- Ultrawide monitors · Laptop plus external display · Keyboard-first layout
- Replaces
- Magnet, BetterSnapTool subscriptions, Moom for basic snapping
- Platforms
- Mac
- Last verified
- 2026-06-22
Why it's listed
Does the one job Magnet charges for, with source code you can inspect.
Rectangle adds keyboard shortcuts and drag zones to resize windows to halves, thirds, and corners. Open source and actively maintained, the default recommendation for Mac users who refuse to rent basic window management.
The catch
No fancy multi-monitor presets like paid Many Tricks tools; learn the shortcuts.
Good fit for
- Remote workers
- Developers with dual monitors
Not ideal for
- People who never resize windows
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