Sprucer AI is a free Chrome add-on developed by Big Pineapple LLC. It is a powerful web design prototyping tool that allows users to edit CSS and prototype live webpages using text commands.

With Sprucer AI, users can simply type commands like "Move the title up a bit" or "Put drop shadow on all the buttons" and instantly see the results. It provides a convenient way to visualize changes in real-time without the need for complicated coding or manual adjustments.

To use Sprucer AI, users can click on the extension button in the top-right corner of the browser to display the menu. They can then enter their specific commands into the text box and click submit. The tool encourages users to be as specific as possible to achieve the desired results.

If users are not satisfied with the outcome, they can easily click the Undo button and make modifications to their commands. It's worth noting that Sprucer AI does not work on special Chrome pages like the New Tab page.

Overall, Sprucer AI offers a user-friendly and efficient way to edit CSS and prototype webpages. It simplifies the design process and allows users to quickly apply changes to their websites. Although it is currently in beta release, the developer encourages users to provide feedback and report any issues they encounter during usage.