is a highly popular, free on-screen pixel ruler and reading guide designed to help designers, developers, and researchers measure anything on their desktop with precision. Originally released as freeware, it has recently become open source , with its code available for the community to explore and contribute to. Key Features
: Drag the ruler anywhere on the screen with your mouse or move it one pixel at a time using your arrow keys.
: Toggle between horizontal and vertical views by clicking control boxes at the ruler's edge or using keyboard shortcuts like the slash (/) key.
: The software is resource-light and can be run without installation, making it easy to carry on a USB drive and use on multiple computers. How to Use
: Seamlessly switch between a ruler mode for measuring and a reading guide mode that acts as a narrow bar to help you track lines of text in long emails or spreadsheets.