.CDI File Extension

File created by DealMaker, an investment deal structuring application; contains pre-price deal models that can be analyzed by prospective clients; includes customized data like collateral, cash-flow waterfall, and priority of payments; holds reports of numerous prepayment and default stress simulations.

A CDI file is a disc image created by Padus DiscJuggler, disc-authoring software for Windows. It stores an exact duplicate of the contents of the original CD or DVD in the proprietary DiscJuggler Disc Image format. CDI files support CD-R, CD-RW, DVD-R, DVD+R, DVD-RW, and DVD+RW formats.

Padus introduced DiscJuggler and the proprietary CDI format in the late-1990s but discontinued the software after releasing version 6 in 2006. The application includes various tools for duplicating, extracting, and mastering discs.

While there are many disc-related uses for DiscJuggler, the Sega Dreamcast gaming community embraced the program. Due to its support of multisession CD images, which was unique in the late-1990s, Dreamcast gamers commonly used the software to burn Sega Dreamcast games.

You can open a CDI file with Padus DiscJuggler in Windows and burn it to a disc by selecting New → Burn Disc. Unfortunately, however, DiscJuggler is no longer available for download.

Fortunately, other disc authoring applications support the CDI format, including PowerISO (Windows) and Lightning UK ImgBurn (Windows).

PowerISO and cdi2iso can convert CDI files to the more common .ISO format.