PDF Converters
One thing both Ubuntu and Debian has is their built-in PDF converters packages. You can easily convert PDF to multiple images per page for consumption.
Installation
Installation
The installation is quite easy:
$ sudo apt install poppler-utils -y
That's it. One of my favorite is:
$ pdftoppm -png </path/to/pdf> <image_name>
That's all about PDF conversion on Debian9.