Smart CSS Debugger is a free Chrome add-on designed to simplify frontend debugging for developers and designers. This tool allows users to hover over any HTML element on a webpage to instantly view essential attributes such as tag, ID, and class in a user-friendly tooltip. It eliminates the need for navigating through the DevTools inspector, enabling a more efficient workflow while inspecting elements.

In addition to inspecting elements, Smart CSS Debugger provides quick access to computed styles, allowing users to view applied CSS rules instantly. It also features the ability to copy unique CSS selectors, making it easy to grab selectors for further testing or styling. This add-on is particularly beneficial for frontend developers, designers, and testers who are looking to enhance their productivity and streamline their debugging processes.