pdfcpu

pdfcpu is a PDF processor for the command line. It validates and optimizes
PDF files, merges and splits them, rotates, resizes and rearranges pages,
adds stamps and watermarks, encrypts and decrypts, fills forms, extracts
images, fonts and content, manages attachments, bookmarks and keywords,
and validates digital signatures.

Examples

pdfcpu validate report.pdf

pdfcpu optimize report.pdf smaller.pdf

pdfcpu merge all.pdf part1.pdf part2.pdf

mkdir pages && pdfcpu split book.pdf pages

pdfcpu encrypt --upw user --opw owner report.pdf locked.pdf

pdfcpu watermark add "DRAFT" "diag:1, op:.25" report.pdf draft.pdf

File access

pdfcpu can process files in your home directory. To also use USB drives
and other removable media (/media, /mnt), run:

sudo snap connect pdfcpu:removable-media

The configuration, installed fonts and trusted certificates are stored in
~/snap/pdfcpu/current/.config/pdfcpu.