YouTube Thumbnail Viewer+ is a free Chrome extension designed to enhance your viewing experience on YouTube. This tool provides a convenient way to view the thumbnail of the video you are currently watching by displaying it seamlessly in a sidebar. With just a simple button click, users can toggle the visibility of the thumbnail viewer, making it easy to access without interrupting the video playback.

The extension also allows users to click on the displayed thumbnail to see a full-screen, downloadable version. Its low file size ensures fast load times, making it a lightweight addition to your browser. Overall, YouTube Thumbnail Viewer+ is a practical tool for users looking to quickly access and download YouTube video thumbnails.