Select the files you want to combine into a PDF. Alternatively, you can select the files on your desktop. PDF file (s) Split a PDF using Preview. All you need is an internet connection, a browser, and your PDF file Now, without further ado, let’s start discussing the best solutions to split and merge PDFsAdobe Acrobat DC. Supported Platforms: Windows and Mac. Price: $Easy. If you have a PDF that you need to break up into two or more files, you can do Universally Compatible PDF Splitter. It works