Desktop wallpaper, especially photo collages, can be designed using a wide range of free programs and applications available through the Internet. Desktop wallpapers can also be made from artistic drawings when fitted to the right resolution.
Some free programs allow users to upload their photos and adjust them so their resolution can fit the pixel dimensions of their computer screen. The benefit of using programs like this is that it allows users to upload more than one photo, enabling them to create their own custom-made collages of multiple photos. Once all of the photos have been uploaded, formatted, fitted and placed into the collage, the user can then download the completed collage in a certain jpeg quality. The program also has the feature of allowing the user to pick the level of quality they want the new image to be in, with a "generate image" feature that allows the user to preview how the image will look in a particular quality.
There are many other types of wallpaper generators and design interfaces that can be found through the Internet. Some of these programs have preset images or rely on the user to upload the material they wish to work with. Other programs operate purely as interfaces for designing new images altogether.