Steam Design Tools is a Chrome extension developed by mtmzorro that enhances your Steam profile with background previews and showcase designs. With this free tool, you can store personal profile backgrounds from the Steam 2020 Summer Sale, the Steam Market, and your personal inventory.

One of the key features of Steam Design Tools is the ability to apply stored background images to your Steam profile in real-time. This allows you to preview how different backgrounds will look on your profile before making a selection. Additionally, the extension also enhances the showcase functionality on your profile, allowing you to replace local images in your showcases with real-time previews.

Overall, Steam Design Tools is a valuable addition for Steam users who want to enhance their profile with personalized background images and showcase designs. The extension is easy to use and provides a convenient way to preview and experiment with different designs.