qpdf — Versatile PDF transformation software. More information: <https://manned.org/qpdf>.

Extract pages 1-3, 5, and 6-10 from a PDF file and save them as another one

qpdf --empty --pages {{path/to/input.pdf}} {{1-3,5,6-10}} -- {{path/to/output.pdf}}

Merge (concatenate) all the pages of multiple PDF files and save the result as a new PDF

qpdf --empty --pages {{path/to/file1.pdf file2.pdf ...}} -- {{path/to/output.pdf}}

Merge (concatenate) given pages from a list of PDF files and save the result as a new PDF

qpdf --empty --pages {{path/to/file1.pdf}} {{1,6-8}} {{path/to/file2.pdf}} {{3,4,5}} -- {{path/to/output.pdf}}

Write each group of `n` pages to a separate output file with a given filename pattern

qpdf --split-pages={{n}} {{path/to/input.pdf}} {{path/to/out_%d.pdf}}

Rotate certain pages of a PDF with a given angle

qpdf --rotate={{90:2,4,6}} --rotate={{180:7-8}} {{path/to/input.pdf}} {{path/to/output.pdf}}