Illustrator is a vector graphic editor that can be used to create illustrations, logos, and other graphics. It can be compressed using a number of methods, but the most popular way to compress Illustrator files is by using the compressor utility included with the software. To compress Illustrator files, open the compressor utility and select the desired compression method. The compressor will then start working on your file and will take a few minutes to finish. Once it has finished, you will have a smaller file size but with less data capacity.