ASC File Format

Files with an extension of ".ASC" are usually ASCII text files, similar to the TXT file format. For Windows, while double-clicking an "ASC" file does not normally open Notepad, these files can normally be viewed with such a tool.

Windows users: NOTE that unless you have configured your computer with the file extension viewing tweak, it is possible that a filename that looks like it ends with ".asc", especially one attached to an e-mail message, actually has a hidden OTHER extension, meaning that if you double-click the file, it may actually run a computer virus!