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 ...

The best free PDF reader apps do more than just act as a PDF viewer - any modern browser can do that. What I'm looking for is tools that go beyond that, offering commenting, collaboration, and ...

You can find free PDF editors on the internet, but their most important features tend to be behind a paywall. Most PDF editors are web apps that work on both Windows and Mac, though some have desktop ...