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.

You can turn images into PDFs by clicking JPG to PDF, and pointing the website towards a file on your computer, in Google Drive or in Dropbox—choose your page size and margin options, then click ...

If you have a JPG file and want to convert it to PNG and then PDF, you need to use two different tools. First, you can use the built-in Paint app to convert a JPG image into a PNG.

In Finder, select all the images you want to include in the PDF. To do this, drag a box over several images files using your mouse cursor, or select them individually by holding the Command key ...

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

Outlook 2013 supports the inclusion of JPG, GIF, PNG and BMP image files directly in a signature. To add a PDF image, you must include it as a Web link.

You can find free PDF editors on the internet, but their most important features tend to be behind a paywall. Here we recommend five free PDF editors.