If you have too many PDF files on your device, they may take up much space. The size of PDF files is often larger than that of other kinds of documents. A PDF document can contain text formatting as well as images. PDF is the acronym of Portable Document Format, which is a kind of file format designed by Adobe in 1993. Please read the methods mentioned on this page carefully. This post offered by MiniTool discusses on how to reduce PDF file size on Mac. When people are dealing with large PDF files, they may want to compress it to reduce size so as to save storage space on disk.
The PDF file is a document originally created by Adobe.