Pick Save as PDF to choose a filename and destination, and you can even add password protection to the document if you want to. There's PDF functionality built right into Finder as well.

A simple automation that allows you to combine multiple PDF files or image files into a single PDF document using Apple Shortcuts app.

To convert a JPG file to a PDF file, simply change the file format on your computer's default photo-viewing app.

Windows allows you to convert any image file with JPG, JPEG, PNG format to PDF without installing any third-party software via Windows Photos App.

Different formats can also make managing several documents cumbersome. Combining these documents into a single PDF file may be helpful for personal or professional use, to deliver simplified, ...

You can insert a PDF into Word via the File, Open menu, which turns the PDF into an editable document, or as a non-editable image.