Below you will find a collection of popular file extensions, how to open them on Windows and Mac, and various file formats available on your computer. Before we jump into the “advanced” mode, let’s get back to some basics.
Here is an exhaustive collections of files. Feel free to browse through them, and if you have any questions, require help, send an email with your question.
Every file residing on your computer — with a file extension to it — can be opened using one or several applications. The files must have an extension, otherwise the application will not be able to recognize the file.
For example, consider a file that has no extension — there’s no suffix at the end of the filename. This can only mean three things:
Similar terms: Filename extensions, file format, filename format.
Your computer, or more specifically your Operating System, is really smart to identify various file extension. Your OS will do the “matching” job. Microsoft has an useful article on how their Operating System recognizes various file extensions and opens them various already-installed programs:
When you double-click a file to open it, Windows XP (Windows Vista, Windows 7) examines the file name extension. If the Windows OS recognizes the file name extension, it opens the file in the program that is associated with that file name extension.