When you think of JPGs, you likely think of the photos you capture with your phone camera or the pictures you download online. However, JPGs can actually be a lot of other things, such as a screenshot ...
If you've scanned a document with your scanner or phone and have the image as a JPG file, it's often useful to convert that image to a PDF. Using Adobe Acrobat, you can even automatically process text ...
OpenOffice is not a file converter, but you can use it to add a JPG to a document and then export that document as a PDF file. Although it can't open PDF files, OpenOffice can save valid PDF files ...
It's a common need to want to save and export a Microsoft Word document as a different file type. Fortunately, you can use Microsoft Word to export documents in a variety of file types, including PDF.