Convert color PDF to grayscale (Color PDF to Black and White) in Ubuntu Curt Sahd Read more posts by this author. Curt Sahd 25 Apr 2011 • 1 min read pdf2ps -sDEVICE=psgray nameOfPDF.pdf ps2pdf nameOfPs.ps Converts pdf to postscript file and saves as grayscale Converts postscript file to pdf and retains quality of original pdf Cheers