ImageMagick and GD are software libraries which should be present on a hosting server for images to show up on a particular site. They enable you to perform a variety of tasks with the images - create, flip, resize, change colors, etcetera. These things can easily be performed online and in real time, so if you include a static image, for instance, the libraries make it possible for a thumbnail to appear on the internet site or for the image to be resized automatically depending on the device and resolution that the visitor is using. Both ImageMagick and GD may be employed with various web programming languages like PHP, Perl and Python, so you do not have to stick to one particular language to develop your internet site. They work with more than one hundred formats, including the most frequently used ones - JPEG, GIF, TIFF, PNG, and so on.