You can get the Adobe Acrobat Reader free at:

https://get.adobe.com/reader/

It available for many different operating systems and versions. You just have to select the one you are running, whether Microsoft or Apple or Android.

There are several tools that let you convert a PDF file to JPG. Here is a link to one:

http://smallpdf.com/pdf-to-jpg

I haven't used this service but I believe it will produce a separate JPG file for each picture that it finds in the PDF file you submit. Thus you may get several files back after conversion and text will not be converted, only images.