This all-in-one office suite allows you to open DjVu files and export them directly to PDF using its built-in "Export to PDF" feature.
These programs allow for offline conversion, which is often faster and more secure for private documents:
This specialized utility is noted for its user-friendly interface and support for efficient JBIG2 encoding, which keeps black-and-white PDF file sizes small. Alternative "Virtual Printer" Method
If you're looking for a reliable way to convert DjVu files to PDF, several reputable software options and methods are available for download. Recommended Downloadable Software