File-Magic can be considered a versatile file viewer that makes easy the process of managing, and handling numerous file types, especially the often confusing or varied "dot" file types.
If you need to work with frequently-used types such as .pdf, as well as less common ones such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/