BAK3 file format description

Many people share .bak3 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .bak3 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .bak3 files.

1 filename extension(s) found in our database.

.bak1 - Starbound Backup Data

The BAK1 game data files are related to Starbound. The BAK1 file is a Starbound Backup Data. Starbound is an action-adventure video game developed and published by Chucklefish Games.

Game Data files
- / -
bak2, bak3
Starbound Backup Data related extensions:
Starbound Backup Data
Starbound Mod Package
Starbound Player Data
Starbound Ship Data
Starbound World Data

Naturally, other applications may also use the .bak3 file extension. Even harmful programs can create .bak3 files. Be especially cautious with .bak3 files coming from an unknown source!

Can't open a .bak3 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 .bak3 file extension is often given incorrectly!

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

bak, bk3

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Finale Backup Data
Cashbook Complete Company Data
VoCATS Modified Test Backup
Cast Soft wysiwyg Backup Data
BSL Background Subtraction Data
TED5 Backup

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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If you have useful information about the .bak3 file format, then write to us! >> BAK3 file