Covert multipage PDF to an image

ImageMagick provides powerful tools to manipulate images. I was surprised to learn that it can even handle PDFs. To convert a multipage PDF to a single image with all the pages (vertically lined), you just need one command

convert some_file.pdf -append image.jpg

If you want the pages aligned horizontally

convert some_file.pdf +append image.jpg

You can also control the size of each page by passing additional parameter ‘resize’

convert some_file.pdf -append -resize 800 image.jpg

Note: convert is a command line utility that will get installed when you install ImageMagick