ImageMagick and GD are software libraries that should be present on a web server for images to appear on a particular internet site. They allow you to carry out a variety of tasks with the images - create, flip, resize, change colors, and so forth. 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 site or for the image to be resized automatically based on the device and resolution that the visitor is using. Both ImageMagick and GD can be employed with lots of web programming languages like PHP, Perl and Python, so you do not need to stick to one particular language to build your website. They work with over a hundred formats, including the most frequently used ones - JPEG, GIF, TIFF, PNG, and so on.