File-Magic can be considered a reliable file viewer that simplifies the task of managing, and managing a wide variety of file extensions, including complex or diverse "dot" extensions.
If you need to work with standard file extensions such as .pdf, as well as uncommon file types like . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/