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.

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.

To convert a JPG to PDF, you'll need to change the file format on your computer's default photo-viewing app. For Windows users, this process is done in the built-in Photos app, and for macOS users ...