Window Size Overlay is a free Chrome add-on designed for web developers and designers, providing real-time measurements of the open page or browser window. This tool displays the viewport dimensions and the device pixel ratio (DPR) in the bottom-right corner of the screen, allowing users to keep track of the size of the content they are working on. With its straightforward functionality, it enhances the workflow of anyone involved in web design by eliminating the need to manually check dimensions.

The plugin is lightweight and easy to install, making it accessible for anyone looking to optimize their web development process. It seamlessly integrates into the Chrome browser, ensuring that users can focus on their work without distractions. By providing immediate feedback on window sizes, Window Size Overlay helps developers create responsive designs that look great on various devices.