Free Ruler

What is Free Ruler?

Free Ruler is a native macOS utility for measuring items on screen with floating horizontal and vertical rulers. It helps designers, developers, and other Mac users check spacing, dimensions, and alignment directly on the desktop without taking screenshots or opening a design suite. The app supports multiple rulers, lets you switch between pixels, millimeters, and inches, and can keep rulers above other windows while you work. You can move rulers together or independently, resize them by dragging, and quickly show or hide them from the app’s controls and shortcuts. Free Ruler is a focused helper app for layout checks, interface reviews, and general on-screen measurement tasks on Mac.

Key features

• Measure on-screen distances with floating rulers
• Switch between pixels, millimeters, and inches
• Use multiple horizontal and vertical rulers at once
• Keep rulers above other apps while working
• Move rulers independently or as a group
• Resize rulers by dragging their ends
• Show or hide rulers quickly with shortcuts

Safety overview

Status: Safe

Free Ruler is a straightforward measurement utility for macOS. Its normal behavior is to display rulers on your screen and stay available while you compare sizes and spacing in other apps. Keep it if you use on-screen measurement tools regularly; if not, removing it should only affect your ability to use its ruler overlays and saved app settings.

Recommendation: Keep Free Ruler if you use your Mac for design, layout review, or any task that benefits from quick screen measurements. If you no longer use it, you can remove it like other Mac apps without affecting unrelated software.

Common paths

• /Applications/Free Ruler.app

Preference paths

• ~/Library/Preferences/com.pascal.freeruler.plist

Related can I delete pages

• ~/Library/Preferences/com.pascal.freeruler.plist

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