PDF files

How to Scan, Edit and Sign PDF Files on Your Phone or Tablet

Spotlight on pdfly, the Swiss Army knife for PDF files

How to combine PDF files

Mutool – all purpose tool for dealing with PDF files

Google's Gemini AI caught scanning Google Drive PDF files without permission

Libgourou: A Free Implementation of Adobe's Adept DRM on ePub/PDF Files

Pixelmator Pro 3.4 Camelot brings advanced support for PDF files