Table of Contents

Ghostscript

PDF Merge

gs -dNOPAUSE -dQUIET -dBATCH -sDEVICE=pdfwrite -sOutputFile=output.pdf input1.pdf input2.pdf

PDF Compression

gs -dNOPAUSE -dQUIET -dBATCH -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -sOutputFile=output.pdf input.pdf
gs -dNOPAUSE -dQUIET -dBATCH -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dDownsampleColorImages=true -dColorImageResolution=72 -sOutputFile=output.pdf input.pdf

References

Ghostscript
https://www.ghostscript.com/