If speed is the main issue the relatively new pdf file viewer MuPDF could be an option. MuPDF is a bare-bones pdf file viewer with a low memory footprint and the fastest pdf loading times that we have experienced until now. The pdf reader is a portable Open-Source cross-platform program for Windows, Linux and Mac OS operating systems.

Users can either execute the program which will open a small file browser to pick a PDF document or link the pdf file extension to the program so that it will be automatically the viewer of choice for pdf files.

MuPDF is perfect for users who want a portable resource friendly pdf reader. It comes with a few keyboard shortcuts to navigate documents more easily but lacks the functionality of Foxit Reader or Adobe Reader.

• L, R Rotate page in 90° increments
• +, – Zoom in and out
• W Shrink wrap window
• N, space Next page
• B, backspace Previous page
• Shift-N Skip 10 pages forward
• Shift-B Skip 10 pages backward
• M Mark page for snap back
• T Pop back to last mark
• 123G Go to page

Not everyone needs advanced functionality but some users might miss options to copy text, search for text or print a selection of the pdf file. MuPDF on the other hand is probably the best solution for users who want to view – and only view – pdf files on their computer system without having to download and install a software program. A Firefox add-on is provided by the developer as well to view pdf documents on the Internet.