If a file is encrypted or the formatting is breaking in a converter, you can always open the file in its native viewer and use the function or take high-quality screenshots. PDF Conversion in .NET: Convert DOCX, HTML and more with C#
"The what?"
If you're comfortable with programming, you could use libraries like python-docx for Python (for working with .docx files) or similar libraries for other languages to parse and generate PDF files.
Look for the "More Options" menu (vertical ellipsis) in the top right corner.