.CDI File

File extension cdi is mainly associated with DiscJuggler, a professional burning program, developed by Padus, Inc.

CDI format was the default disk image format of DiscJuggler. The program is not further developed, but cdi files are still supported by many other burning programs.

There was also program called CD Anywhere produced by Alpeak Technology, but that appears to be completely different disk image format.

Note: In 1991 join venture of Sony and Philips produced a game console that did use CD-I (Compact Disc Interactive) discs. It is not a name of file format, rather the physical media and has nothing to do with DiscJuggler. However, IsoBuster is supposed to access the data from CD-I discs.

This cdi 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.

Files with cdi extension are most likely best known for its use as disk images for the DiscJuggler burning software for Windows. 

How to open:

CDI format is supported by most modern burning software.

How to convert:

Can be converted to ISO with ISOBuster.