ImageMagick and GD are software libraries which should be present on a server for images to show up on a particular internet site. They enable you to carry out various tasks with the images - create, flip, resize, change colors, etcetera. These things can certainly be performed online and in real time, so if you add a static image, for example, the libraries make it possible for a thumbnail to show up on the site or for the image to be resized automatically with regards to the device and resolution that the site visitor is using. Both ImageMagick and GD may be employed with many web programming languages like PHP, Perl and Python, so you do not need to stick to only one language to create your site. They work with over 100 formats, which includes the most widespread ones - JPEG, GIF, TIFF, PNG, etc.