I wrote docleaner (https://github.com/TUD-CERT/docleaner https://github.com/TUD-CERT/docleaner) for a very similar purpose, specifically to remove unintended PI

I wrote docleaner (https://github.com/TUD-CERT/docleaner https://github.com/TUD-CERT/docleaner) for a very similar purpose, specifically to remove unintended PII from PDFs that are created from e.g. Word. I don't host it anywhere publicly, though.