File-Magic can be considered a reliable file viewer that streamlines the task of opening, and working with a large range of file extensions, especially complex or multifaceted "dot" files.
In case you encounter standard formats like .docx, and even less common formats such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/