The Reading Ruler is a Chrome add-on designed to assist users in reading and retaining information on websites. It provides a helpful tool for individuals who are neurodivergent. One common technique suggested for those who have difficulty reading and retaining information is to use a ruler to follow along each line.

This add-on implements a virtual ruler that overlays the webpage, moving along with the cursor and darkening the lower half of the text to simulate the line-by-line reading technique. The Reading Ruler aims to enhance the reading experience for users who benefit from visual aids while navigating online content.