01
Snap a measurement box to the exact interface
Frame a card, chart, or control and read its live position, width, height, and edge distances without estimating from a screenshot.
Screen RulerMac Workflows
Measure any interface directly on screen, down to the pixel.
Screen Ruler floats above the app, website, or design you are checking. Snap a box to a visible object, measure the distance and angle between any two points, or place horizontal and vertical guides that label exact gaps. Freeze a frame when the target moves, hold several measurements for comparison, then copy or save the values without annotating the original screen.
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What it does
Measure objects, distances, angles, boxes, and alignment gaps directly over any screen.
Snap a measurement box to the visible edges of a card, button, image, or panel.
Read position, width, height, and surrounding edge distances together.
Measure total distance, horizontal and vertical offsets, and angle between any two points.
Place paired horizontal or vertical guides and see the exact gap between them.
Freeze the screen when animation or movement makes a live target difficult to inspect.
Hold several measurements, then copy or save one value or the complete set.
See the workflow
Measure objects, distances, angles, boxes, and alignment gaps directly over any screen.
Snap a measurement box to the visible edges of a card, button, image, or panel.
02
Measure distance, direction, and angle between two points
Drag across any two points and keep the total distance, horizontal and vertical offsets, and angle visible in one precise readout.
03
Check alignment and gaps with persistent guides
Place horizontal and vertical guides around a layout and let Foldout label the exact space between matching lines while the interface stays visible beneath them.
Why it belongs
Why Screen Ruler earns a place in the toolbox.
The practical details that make this job faster, clearer, or safer than doing it by hand.
Objects become measurable targets
Draw around a visible interface element and Object mode snaps the box to its edges, keeping dimensions and surrounding distances in one live readout.
A line carries more than one number
Distance mode reports the complete length alongside horizontal and vertical offsets and angle, so diagonal relationships stay unambiguous.
Guides turn alignment into evidence
Drop horizontal and vertical guides over the real layout and Foldout labels the gaps between matching lines while the source remains visible.
Measurements remain usable after the check
Freeze a moving screen, hold several readings in the drawer, and copy or save individual measurements or the complete set.
How to use it
From opening the tool to saving the result.
- 01
Start Screen Ruler over the interface you need to inspect.
- 02
Choose Object, Distance, Box, or Guides mode.
- 03
Snap, drag, or place guides until the exact relationship is visible.
- 04
Hold, copy, or save the measurements you need.
Questions
Before you try Screen Ruler
Can Screen Ruler measure a live app or website?
Yes. The overlay sits above the current screen, so the interface remains visible while you measure it.
Can it keep more than one measurement?
Yes. Hold a line or box in the measurement drawer, continue measuring, then copy or save individual readings or the complete set.
Does Object mode need screen access?
Object snapping and frozen snapshots require Screen Recording permission so Foldout can inspect the visible pixels. Basic live box, distance, and guide measuring does not.
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