An On-Screen Ruler is an app (or website) that provides a virtual ruler to measure distances on a computer screen. It can be used to measure the size of a graphic or photo, or to determine the size of an object or certain area on a screen. This app is especially useful for graphic designers, web designers, photographers and other professionals who need to accurately measure distances on a computer screen. The On-Screen Ruler app allows users to measure by pixels, inches or centimeters, and also offers a variety of customizable features such as grid lines, zoom and more.
Discontinued The program is no longer updated. The latest version, 1.0 R78, released in August 2009, can still be downloaded from Google Code.