A web app makes it cross platform. If you have a homelab, deploy it only once for every client.
And PDFtk doesn’t do annotations afaik which is a huge pain point on Linux (at least for me) because there are no applications that I know of to easily do things that are trivial on OSX like adding text or hand drawn signatures to PDFs. Masterpdf can do it but with a watermark and some limitations.
Maybe it doesn’t suit your particular use case but I wouldn’t say pdftk can replace this project.
And PDFtk doesn’t do annotations afaik which is a huge pain point on Linux (at least for me) because there are no applications that I know of to easily do things that are trivial on OSX like adding text or hand drawn signatures to PDFs. Masterpdf can do it but with a watermark and some limitations.
Maybe it doesn’t suit your particular use case but I wouldn’t say pdftk can replace this project.