FileMagic can be considered a reliable file-handling software that makes easy the task of opening, and managing a large range of file extensions, such as complex and diverse "dot" extensions.
In case you encounter frequently-used file extensions such as .docx, and even more obscure ones including . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/