Pixels, not guesses
Measure exact distances and box sizes on screen, so spacing and sizing debates end with a number.
Mac Workflows
Measure distances, boxes, guides, and snapped objects across displays.
Screen Ruler lays precise measurement overlays right on top of whatever you are looking at - distances, boxes, alignment guides, even snapping to the edges of an on-screen object - across every display, so 'is that 16 or 20 pixels?' finally has an answer.
Start the 14-day trial in the app. No payment method is required to try Foldout.
Processes on your MacTool work stays inside the local app.
Signed and notarizedBuilt for Apple Silicon Macs.
No usage trackingFoldout does not track what you do in the app.
Paddle checkoutPaddle shows price, tax, and terms before purchase.
What it does
Measure anything on screen down to the pixel.
Measure pixel distances and box dimensions.
Drop alignment guides and a crosshair.
Snap measurements to on-screen objects.
Works across multiple connected displays.
Detailed capabilities
What Screen Ruler covers.
Concrete features, inputs, and workflow details for this tool.
Guides and snapping
Place alignment guides and let the ruler snap to the edges of a button or card for a clean read.
Every display covered
Measure across all your connected screens, wherever the thing you need to size happens to be.
How to use it
From opening the tool to saving the result.
- 01
Start Screen Ruler.
- 02
Choose a ruler mode.
- 03
Measure the area or distance.
- 04
Copy, save, or exit the overlay.
Questions
Before you try Screen Ruler
Does live measuring need screen recording permission?
Basic measuring is permission-free; frozen snapshots or smart snapping may require screen access.
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