Doc Batch Converter

DocBatchConverter makes it simple to convert any number of files from one format, such as ".doc" to another, such as ".pdf" or ".txt". It isn't limited to word processing files. It can do any conversion that OpenOffice can perform because it uses OpenOffice to do the actual conversion.
DocBatchConverter is a Graphical User Interface (GUI) client, written in Java, that uses the OpenOffice program as a server. OpenOffice actually does the conversions. When DocBatchConverter starts up, it also starts OpenOffice. Then, to request a conversion, DocBatchConverter communicates with OpenOffice and makes the request. Open office determines what conversion to make depending on the input files' extensions (which don't all have to be the same) and the output extension (which is the same for all output files).

More information at https://doc-batch-converter.sourceforge.io/.