NFO is a document file attached to pirate software distributed on warez or torrent websites. NFO file is typically included as a part of archive or files such as software, computer games, or crack files.

NFO format is used by crackers to include information about them, usually as ASCII Art. Sometimes NFO files contain information on software version or installation guide. NFO files should not be confused with system files that use the same NFO suffix. NFO files can be opened using any text editor.