Preload Bmp, Gif, Jpg, and Png Images for Your Website in One Simplified Step. Preloader Maker is an amazingly simple way to preload Website images. Just type in your image filenames or right click to copy and paste. You can edit existing entries and delete unneeded filenames as you wish. The preloader code is generated instantly. Your images will open faster and rollover effects can appear to have a seamless look.