PDF exports in Confluence are very hit-miss for my organization, at least. And DOC export has been obsolete for some time now: DOCX has been the standard for MS Office since the late 2000s. There are several Java libraries that could possibly resolve these issues. Thanks!

• https://www.docx4java.org/trac/docx4j
• https://poi.apache.org/
• https://pdfbox.apache.org/
• https://github.com/LibrePDF/OpenPDF