FileMagic is known as a reliable file viewer that simplifies the task of opening, and managing numerous file extensions, especially hard-to-handle and diverse "dot" extensions.
If you need to work with standard file extensions such as .pdf, or more obscure formats such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/