FileMagic is a reliable file viewer that streamlines the task of managing, and working with a wide variety of file extensions, including complex or multifaceted "dot" file types.
If you need to work with common formats like .docx, and even more obscure formats like . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/