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This article is about the Windows file system browser. For file browsers and file managers in general, see file manager. File Explorer, previously known as Windows Explorer, is a file manager application that is included with releases of the Microsoft Windows operating system from Windows 95 onwards. It provides a graphical user interface for accessing the file systems.
What is a file extension? A file extension is the characters after the last dot in a file name. For example, in the file name winmail.dat, the file extension is dat. It helps Windows select the right program to open the file. We help you open your file. We have a huge database of file extensions (file types) with detailed descriptions.