File Magic is a versatile file-handling software that simplifies the task of opening, and managing a large range of file formats, especially the often confusing and multifaceted "dot" files.
If you need to work with standard types 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/