Screen Ruler icon

App Specs
File size:
2.78 MB
March 16, 2011
January 9, 2013

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Screen Ruler is a menu bar app featuring a collection of simple-to-use, yet powerful tools for working with on-screen graphics. It includes four handy tools including: box and line measurement tools for making pixel perfect measurements, a color picker for determining the exact color of a pixel, and a grab image tool for making screenshot selections.

The Box Measurement Tool provides a way to get the exact pixel width and height of an area anywhere on your display.

The Line Measurement Tool determines the length and angle between any two pixels.

The Color Picker provides an easy way to obtain a web-ready hex color, or Core Graphics compatible RGB fraction from anywhere on your display.

The Grab Image Tool allows one to take a screenshot of anything on-screen.

Key features:
  • An intuitive, easy-to-use, no-clutter interface
  • Run from the menu bar so that it's always there when you need it
  • Take accurate measurements anywhere on-screen, even across multiple displays
  • Two methods to measure: click and drag, or click-move-click
  • Proportional measurements can be obtained by holding the shift key
  • Measure in pixels, mm, cm, inches, points, or picas
  • Get colors in hex, decimal, CGColor, glColor4f, NSColor, or UIColor
  • Easy keyboard shortcuts for initiating measurements, picking a color, taking screenshots, and quickly copying width, height, length, color, and image data
  • The Persistent Ruler option allow you to leave a ruler on-screen as long as desired
  • Works with multiple displays
  • Compatible with Mac OS Lion (10.7) and Mountain Lion (10.8)

    Screen Ruler is a great utility for anyone that works with digital graphics, including: web designers, graphic artists, and programmers.

    Visit our web site for a demonstration video and see why Screen Ruler is the best on-screen ruler available for Mac.

  • What's New
    New in 3.1:
  • Added measurements to the box ruler.
  • Persistent rulers can now be resized.
  • Added button to clear all persistent rulers.
  • Fixed a bug where persistent rulers could be created that were too small to contain a close button.
  • Fixed a bug that caused ruler color inconsistencies across multiple displays.
  • The option key can now be held down to hide the zoomed in cursor view.
  • Fixed a bug where a dragging operation could begin at the second click.
  • Custom measurement units now show custom ruler ticks.
  • In help, linked to tech support.
  • Improved the user interface.

    New in 3.0:
  • Rulers can now optionally be made persistent to stay on-screen for as long as desired (our most requested feature).
  • Mac OS 10.8 (Mountain Lion) is now fully supported.
  • Partial Retina Display support has been added.
  • Screen Ruler is now runs exclusively from the menu bar.
  • The zoomed-in cursor view now floats beside your cursor.
  • The interfaces has been streamlined and made more compact.
  • The color picker now can produce code for iOS and Mac developers.
  • Screen Ruler 3 is not compatible with Mac OS 10.6 (Snow Leopard) or earlier.

  • Screen Ruler (ca.sprightly.screenruler) is a Mac software application that has been discovered and submitted by users of

    Operating System: Mac

    Default Install Path: /Applications/Screen

    Minimum OS version: 10.6