Screen Ruler is a free Chrome extension developed by Mr Violets, categorized under Browsers and SubCategory Add-ons & Tools. It serves as a valuable tool for web developers and designers to verify website implementation. By activating Screen Ruler, users can easily view and measure sizes, distances, margins, paddings, tag names, IDs, and classes of elements on any web page. The extension can be toggled through various methods like clicking the extension icon, right-click context menu, or using keyboard shortcuts.

With Screen Ruler, users can measure pixel sizes and distances between elements, view HTML tag names, class names, and IDs, select parent/child elements, and enjoy responsive selections that resize with the browser window. For advanced features like Quick Screenshot, Element Inspect, and Precise Selection, users can opt for the PRO tier with a one-time payment for lifetime access.