FileMagic is a powerful file-handling software that makes easy the task of viewing, and managing a large range of file formats, including the often confusing and diverse "dot" extensions.
In case you encounter frequently-used formats including .pdf, as well as less common ones like . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/