CDU file format description

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

1 filename extension(s) found in our database.

.cdu - CDU Paint Image

The CDU graphic files are related to XnView. The CDU file is a CDU Paint Image. CDU Paint is an image editing software on Commodore 64 computer.

Graphic files
- / -
CDU Paint Image related extensions:
ZX Spectrum Hobetta Image
Pocket PC Bitmap Image
Amapi Image
Sony Mavica Picture
GoDot Image
TI-73 Bitmap

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

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

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

ccu, cd, cdi, cdj, cdk, cdy, cfu, cru, csu, cu, cud, cvu, cwu, dcu, ddu

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Calamus Document
The Suffering: Ties That Bind Game VDU Data
DiscJuggler CD Image
Across crossWAN Package
my Knowledge Explorer Change Unit
Cinderella Construction File

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

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

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