Compass SCSS Editor is a free Chrome add-on designed to enhance web development by providing a playground for SCSS, SASS, and HAML. This tool features syntax highlighting and CSS property auto-complete, allowing developers to code more efficiently. Users can start coding immediately without needing to set up a boilerplate HTML file, which streamlines the development process.

One of the key features is the real-time preview of the compiled CSS, displayed side-by-side with the code. Additionally, hovering over highlighted CSS properties reveals helpful tooltips, while a documentation panel is available for quick reference, provided there is enough space in the window. Overall, Compass SCSS Editor is an effective tool for web developers looking to improve their workflow.