in reply to Mike Gifford, CPWA

Sometimes I use CloudConvert (cloudconvert.com/) to convert files because they support many types.

For usual PDF-Stuff I use Stirling-PDF (github.com/Stirling-Tools/Stir…) a lot. I have it self-hosted on a small server via Docker.

Haven't tested the conversions yet but it may be worth a try. I mainly use the multi-tool to rotate, add or remove single pages of a PDF file.