Can't view PDF files? Unable to open PDF Files? PDF Files will not open in Internet Explorer 11? Learn how to fix the problem & make IE open PDF Files.

Fix Adobe Acrobat Reader could not open PDF because it is either not a supported file type or because the file has been damaged error on PC.

The big difference is that if you want to use the keyboard, there is CMD+o to open files in Mac OS, whereas it's Enter in Windows.

SumatraPDF is an open source reader app that allows you to open and read PDF, EPUB, MOBI, CBZ, CBR, FB2, CHM, XPS, DjVu, and images for free.

Do you have multiple PDFs you need to merge into one? Making one PDF out of many is easier than you might think on both Windows PCs and Macs. Here's how to do it on each platform.