Users can now select .webp images as their desktop wallpaper in Windows 11 by navigating to Settings > Personalization > Desktop Background, as part of Build 26220.7653. This feature is currently available to testers and will roll out to Windows 11 24H2 or 25H2 devices soon. The .webp format allows for high-quality images with smaller file sizes compared to JPG and PNG. Previously, users had to convert images to PNG or JPG for use as wallpapers. Microsoft is also exploring the possibility of allowing video formats like .mp4 as desktop backgrounds, with tests showing that videos can be applied seamlessly without a size limit and stable resource usage. However, this video wallpaper feature has not appeared in the latest builds, leaving .webp images as the current option.