When you access the 4K Desktop wallpaper generator, you will see a randomly generated image and three menus. You can save the generated image in PNG format by clicking 'Save this wallpaper' at the ...

Each of these 4K wallpapers (that's 3840x2160, pixel fans) has been set to a desktop-friendly 16:9 aspect ratio, and with minimal compression so they look super sharp on your monitor.