CZ Document Converter is a very complete office tool that allows you to convert documents among a wide catalog of document formats.
Among these documents there is a bit of everything, some very popular and others not so much, such as PDF, HTML, DOC, XLS, RTF, TXT, WRI, MCW, WPD, WK4, WPS, SAM, WSD, etc. In addition, CZ Document Converter allows you to process in batches, you just have to indicate which folder contains all the documents you want to convert and will pass them to any of these formats.
For programmers it is very interesting that CZ Document Converter can be called from PHP. An example of the PHP code that you should use for this comes in the author's website.
You can free download CZ Document Converter 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.