Fruittful is a free Chrome extension designed by Fruittful, falling under the Browsers category and specifically the Add-ons & Tools subcategory. The program allows users to effortlessly view full-size thumbnails of YouTube videos while browsing the platform. No sign-up or subscription is required for this handy tool.

By simply installing the extension, users can access the "View Thumbnail" button conveniently positioned below YouTube videos to instantly see their full-size thumbnails. For enhanced functionality, users have the option to subscribe to Fruittful for premium features such as Thumbnail Bookmarks and Previews. These premium features enable users to bookmark intriguing thumbnails and preview their own thumbnails directly on the YouTube homepage.