File-Magic can be considered a versatile file viewer that streamlines the task of opening, and working with numerous file types, such as complex and multifaceted "dot" file types.
In case you encounter standard formats including .pdf, and even less common ones such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/