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>> BACKUP file

BACKUP file format description

Many people share .backup files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .backup file can be edited, converted or printed with. On this page, we try to provide assistance for handling .backup files.

1 filename extension(s) found in our database.

.bak - Backup Copy File

BAK file is a Backup Copy file.

.bak file format description:
BAK format description not yet available
Other files
- / -
backup, bk, old, ori, orig
Backup Copy File related links:
Backup Copy File related extensions:
Harmony Controller Firmware Update
Microsoft Office Assistant Actor
Microsoft Office Assistant Preview

Naturally, other applications may also use the .backup file extension. Even harmful programs can create .backup files. Be especially cautious with .backup files coming from an unknown source!

Can't open a .backup file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .backup file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:


If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .backup file format, then write to us!