oam/knowledge base/compare two pdf files.md

Compare two PDF files

Install and use diffpdf (preferred) or diff-pdf:

sudo zypper install diff-pdf

As an alternative:

# create a pdf with the diff as red pixels
compare -verbose -debug coder $PDF_1 $PDF_2 -compose src /tmp/$OUT_FILE.tmp

# merge the diff-pdf with background PDF_1
pdftk /tmp/$OUT_FILE.tmp background $PDF_1 output $OUT_FILE

Further readings

• Compare PDF Files With DiffPDF
• PDF compare on linux command line