A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...

A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

Dylan Turck is a PC hardware, software, and gaming reporter who loves writing how-to guides and in-depth features on the latest tech products. When he's not shocking himself by pulling electronics ...