FileMagic can be considered a versatile file viewer that makes easy the task of managing, and handling a wide variety of file formats, including the often confusing or varied "dot" file types.
If you need to work with common file extensions including .docx, or more obscure ones such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/