PDF files have become ubiquitous in our multi-platform world. This convenient file format makes it possible to view and share documents across various devices using various operating systems and ...

This well-designed and easy-to-use free PDF viewer lets you mark up and create PDFs. Adobe’s popular PDF format makes files look great and Adobe’s free Reader lets everyone look at the files for free.

Mozilla's latest version of Firefox conveniently includes a built-in PDF viewer. If you prefer your own PDF viewer, here's how to change it. Ed Rhee, a freelance writer based in the San Francisco Bay ...