(+) FREE PDF Tools in The Cloud
Portable Document Format files are amongst the best things available in your computer. The biggest advantage of the Portable Document Format is that it can be used across all devices. You can read PDF files on an iPhone, an iPad, Android devices, Windows, Macintosh, Linux, Chromebooks, and probably some other operating systems you never heard of. Indeed, it is a PORTABLE Document Format, usually referred to as a "PDF file."
PDF files are very popular with genealogists. There is a host of ways that they find these capabilities useful. Here are just a few that come to mind:
Convert files to share with family members who may not have the programs you use
Make PDF files found online searchable to find information on ancestors
Convert PDF files found online to a format that lets you extract facts about an ancestor to paste into your genealogy program
Convert PDF files found online to a format that lets you extract images of ancestral people and places
Convert PDF files of genealogy books into other formats, such as Word files or ebook reader formats