Convertfiles let's you use a simple online file converter for various filetypes like PDF, Doc and EPUB. On the website, you can convert archives, spreadsheets and documents to a format of your choosing. Best of all, their conversion service is free and without the need for additional software. Just click the "Browse" button, select your file and upload it. They will take care of the rest. The only restrictions you will find are the file size limit (250mb), and the time the converted file will be available (1 hour).