Problem: You may have a plethora of PDF images that you need to convert to an image format, such as JPG. Too many to convert manually using Adobe Acrobat.
Solution in Three Steps (in a Windows environment):
(1) Install ImageMagick (https://www.imagemagick.org/)
(2) Install Ghostscript (https://www.ghostscript.com/)
(3) Using PowerShell or Command Line, run the following ImageMagick command in the directory containing all the PDFs. (Note the -density option sets the output resolution at 300 dpi. This command will convert all PDFs in the current directory to JPG.)
mogrify -density 300 -format jpg *.pdf
ImageMagick + Ghostcript: Batch Convert PDFs to Images