# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

.OLD File Extension

NEW: Open any file on your PC with File Viewer

Generic Icon
File TypeBackup File
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Rare Uncommon Average Common Very Common
CategoryBackup Files
File Format Description

Typically used as an indicator for a backup copy of a file; appended to the filename when a newer version of the file has been created or saved by a certain program; often placed after the original file suffix (i.e. document.doc.old would be a backup copy of the file "document.doc").

May be created automatically by a software program, but may also be created manually by the user. The ".old" extension may have to be deleted in order for the file to open correctly.

Program(s) that open .OLD files
Microsoft Windows Logo
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Mac OS X Logo
Mac OS
Icon Original program
Updated 6/8/2009