.CDU File

The cdu file extension is mainly related to the CDU-Paint, a picture image editing program for Commodore C64, an 8-bit computers, released in 1982.

The cdu file stores bitmap image (160x200, 16 colors).

Most likely some obsolete bitmap format.

This cdu file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

How to open:

You can view these files using XnView.

How to convert:

Use XnView to export *.cdu files to other formats.