They are generating PDF for online viewing. Go to your files on dropbox site and click on a .doc file. A preview popup will appear. Open/LibreOffice with Pytho

They are generating PDF for online viewing. Go to your files on dropbox site and click on a .doc file. A preview popup will appear. Open/LibreOffice with Python bridge is quite handy in converting documents to PDF format and can be run in headless mode (using virtual frame buffer like xvfb) on a server.