File Magic is a reliable file viewer that simplifies the task of managing, and working with a large range of file extensions, such as the often confusing and multifaceted "dot" file types.
In case you encounter standard file extensions including .pdf, and even uncommon formats such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/