Duplicate pages in pdf is a tool that duplicates the selected page (or pages) the indicated number of times.
Note: setting the duplication counter to, for example, 7 times will duplicate the page 7 times. The indicated page in the pdf file will occur 8 times (7 duplicates + 1 original).
Post-processed pdf files have the phrase "--xN" added to the original file name(N stands for the number of duplications).