You can use the docx2pdf command line utility to batch convert docx to pdf on macOS (or windows). It uses Microsoft Word's APIs to directly convert to PDF creating a perfect copy. It uses JXA (Javscript for Automation, basically AppleScript in JS) in macOS and win32com in Windows.

pip install docx2pdf
docx2pdf myfolder/

Disclaimer: I wrote this tool after struggling to find a cross-platform solution for batch converting docx to pdf with zero formatting issues since it directly uses Microsoft Word. https://github.com/AlJohri/docx2pdf

GitHub

GitHub - AlJohri/docx2pdf

Contribute to AlJohri/docx2pdf development by creating an account on GitHub.