PDF format is used when you need to save files that cannot be modified but still need to be easily shared and printed. In rich textual and graphical format. So converting PDF to any other format is generally not required. For converting any document to PDF can be achieved by individual software itself. e.g. MS office can export document to PDF. OR you can print any document as pdf file. OR there are online services which help converting almost any document to pdf.
G. The Converter.com website provides a service to help people convert any kind of document into PDF format. For online PDF software solutions, go to Convert.com website. For example, Adobe Acrobat can convert any document directly into PDF format. In addition, there are online PDF services by various companies like Adobe Digital Editions, Adobe Muse, Adobe On-Line Publishing and several more. For some reason, the conversion to PDF is almost never available in the software's store, so you cannot simply install them.