Measure anything on your screen.
ScreenRuler is a menu bar app for macOS with on-screen rulers, draggable guides, a colour picker and a full set of geometry tools — from a simple line ruler to Bézier curves, corner-radius gauges and perspective grids.
What it does
- Screen rulers with draggable, snapping guides
- Click-and-drag measurement with live width, height, diagonal and area
- Colour picker with a magnifier, and palette history
- Geometry tools: rectangle, triangle, arc, polygon, ellipse, midpoint, parallel guide, golden ratio, radius gauge, Bézier, perspective, spiral
- A worked, step-by-step breakdown of the maths behind every measurement
- An always-on mini panel with the full keyboard shortcut list
Privacy in one line
Your measurements never leave your Mac. There is no account and no advertising. Anonymous usage analytics are on by default and can be turned off in Settings. See the privacy policy for the full detail.
Privacy Policy
What the app touches, and what never leaves your device.
Terms & Conditions
Licence, subscriptions, refunds and liability.
Support
Questions, bugs or feature requests: devsloopdev@gmail.com