Is there a PDF editor alternative?

Question

PDF

We need a function to be able to remove and add sheets from the document.
That the version was FREE.

Answer 1

Okular https://okular.kde.org/
Xpdf www.xpdfreader.com/download.html

Answer 2

https://pdf.wondershare.com/pdf-knowledge/open-sou...
choose your taste and color

Answer 3

ABBY PDF Transformer is good

Answer 4

You can add/remove sheets in PDF using IrfanView or the same imagemagic (console, you can automate the process), though there this is done by parsing the document into pages and gluing the necessary pages back.
From time to time I use IrfanView for these purposes.

Answer 5

https://pdfsam.org/downloads/
There is no drag and drop in the free version, but you can split the document into sheets file by file and assemble it.

Answer 6

PDFtk

Answer 7

here is another pdf24

Answer 8

If "for users" and the tasks are very typical, then you can make a web face on your knee on a local server by placing pdfjam under it .