For maximum privacy and control, you need to self-host any available open-source PDF editors on your own server.

Extracting the body text from a PDF document is an important but surprisingly difficult task. The reason is that PDF is a layout-based format which specifies the fonts and positions of the individual ...

If PDF text or content disappears when editing, saving or printing files using Adobe, Foxit, etc, then this post will help you troubleshoot the issue.