It's easy to convert images into PDF files -- whether on Windows, Mac, or directly on your mobile phone. We'll show you how it works.

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.

Printing to PDF is a widely available option these days, and it's been made even easier with OS support across most platforms and even on mobile. So while making a PDF out of a Word document or ...

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

In the Preview app, for example, it's possible to create a single multi-page PDF document out of several separate image files.

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.

Give your OpenOffice files a bit of visual flair by adding a background image to your Writer, Calc or Impress document.