Outliner CSS is a Chrome extension developed by tarah that serves as a powerful structure and layout debugger for web developers. This free tool simplifies the process of identifying and resolving CSS issues by inserting CSS outlines to all elements on a webpage.

For developers who have spent years manually adding debug styles to their projects, Outliner CSS offers a convenient solution. With just a few clicks, this extension adds CSS outlines to all elements on the current page. It also provides the option to switch between RGB colors and toggle background color opacity, allowing developers to highlight the depth and hierarchy of elements.

With Outliner CSS, developers can easily visualize the structure and layout of a webpage, making it easier to identify and fix any CSS issues. This extension is a valuable addition to any developer's toolkit, saving time and effort in the debugging process.