Some word-processing programs based on the OpenDocument architecture also support Microsoft Word formats. These programs can open Word documents (*.docx, *.doc) and simply save them in Open Document Interchange Format. Except for some Word exclusive formatting and features, everything should be converted just fine.
Convert Microsoft Word Open XML document to Open Document Interchange Format (ODIF).
We have found 2 software records in our database eligible for .docx to .odf file format conversion.
Apple macOS / Mac OS X software - convert docx to odf on OS X
NeoOffice is an office productivity software for Mac OS X created as an alternative to OpenOffice.org. It has everything needed for common office including word processor, spreadsheet, presentation program, and graphics program.
Convert from docx file
to odf file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned docx to odf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Multiplatform software - convert docx to odf on any platform
LibreOffice Write is a complete word processor and document publishing tool that supports a plethora of document formats and has many innovative features. It's an open source software that comes as an integral part of LibreOffice suite.