Free Ruler 2.0

A ruler application for macOS


  • Horizontal and vertical rulers.
  • Measure in pixels, inches, or millimeters.
  • Float rulers above other applications (press F to toggle).
  • Move windows independently or as a group (press G to toggle).
  • Show or hide the shadow behind rulers (press S to toggle).
  • Align rulers at mouse location (press O for origin).
  • Reset ruler locations with Command-R.


Compatible with macOS Sonoma, Ventura, Catalina, Mojave, and maybe a few older releases. Your feedback is welcome!

For older versions, see the releases page.


See the list of open issues . For feature requests, open a new issue.


If you have experience with Mac app development in Swift, please look at the help wanted issues .

Or you can make a donation.

Made with love by this guy.