There’s PDF functionality built right into Finder as well. If you select multiple files and then Ctrl+click on the selection, you can pick Quick Actions and Create PDF to do just that (most common file types are supported). You’re able to build PDFs in the Preview tool too: As long as you have a PDF open in Preview, you can drag any file type into the table of contents sidebar on the left to add it as an extra page. (If you can’t see the table of contents, choose View and Table of Contents.)
You’ll find a host of useful PDF tools out on the web that you can access from any browser. Take ILovePDF, for instance, which does everything from merging PDFs to adding watermarks to rotating PDF documents. You can turn images into PDFs by clicking JPG to PDF, and pointing the website towards a file on your computer,…