It’s not open-source, so practically the question is equivalent to “why reinvent the wheel by creating libreoffice when there’s a perfectly good Microsoft office suite out there”
It’s not open-source, so practically the question is equivalent to “why reinvent the wheel by creating libreoffice when there’s a perfectly good Microsoft office suite out there”
The server component is under GNU GPL: https://www.pdflabs.com/docs/pdftk-license/
In case anyone gets confused, PDFTk Server is just the name for the CLI tool, which hasn't been updated in 10y+ (and annoying to compile due to newer GCC versions removing GCJ). The pdftk provided in various distros (incl. Debian, Fedora, Arch, NixOS) is pdftk-java, a 3rd-party pure Java port of the original tool.