With no download required, this free tool is the quickest and easiest way to strip the colors from any PDF, so all you're left with is monotone black and white.
I created this tool after discovering how much of a pain it was to use existing solutions to remove the colors from a PDF. All the other ways I could find online involved using an expensive PDF editor program, that I did not have. So I whipped this up, and figured I'd make it available for everyone. Hopefully it helps someone.