PDFsak

About it

Logo from kgullion provided here.

PDFsak (PDF Swiss Army knife) is an utility to manipulate PDF files.

The previous name of the project (as of 2021-10-10) was "pdftools".

It allows you to:

Merge
N-up pages (put more than one input page into a single output page)
Trim pages
Extract pages
Rotate pages
Swap pages
Delete pages
Create handouts
Add text (like page numbers)
Remove owner protection (the one which allows you to open the file without a password, but not to print, annotate or copy from it)
Remove metadata
Simulate Adobe Acrobat Clearscan: vectorize the text to improve quality and readability
Add watermarks or images
And more

PDFsak has been tested on Windows and Linux (Fedora).

It should work also on macOS, although it has not been tested on this platform.

Checkout the online documentation for requirements, installation, usage and examples.