Click the "Select File" button above, and choose your CDI file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert CDI to another file type
To convert CDI disc images to another format, you need Padus DiscJuggler or other Disk Image software.
Convert a file to CDI
To convert other file formats to the "Optical Disc Image" file type, you need software like Padus DiscJuggler or a similar tool.
About CDI files
A .CDI file is primarily a proprietary disc image created by Padus DiscJuggler. It stores an exact sector-by-sector copy of an optical disc, often including complex multi-session track layouts that combine data and CD-Audio. This capability made it the dominant format for backing up and distributing Sega Dreamcast games. You can open these files with legacy tools like Padus DiscJuggler or mount them using virtual drives like Daemon Tools. However, working with .CDI files today is highly frustrating. The original software is abandoned, and modern operating systems like Windows and macOS do not natively support mounting them. The files are often massive, and viewing their contents requires downloading third-party software that is sometimes bundled with adware. Converting a .CDI file to a standard ISO file makes it universally readable, but there is a major catch. Converting multi-session .CDI files to ISO often results in lost CD-Audio tracks because ISO only supports single-session data. For perfect preservation, converting to BIN and CUE is recommended. This file format is difficult to open or convert because it is a closed, proprietary archive. Often only the original software or specialized imaging software can properly read the raw sector data. Our analysis can detect the underlying format to help you view or extract the data safely.
Convert.Guru analyzes your CDI file, detects the exact format, and lets you read the text inside.
If you want to convert CDI file to CHD, GDI, ISO, IMG, DMG, VHD, VMDK, VDI, HDD, QCOW, QCOW2 or RAW, you can use Padus DiscJuggler or similar software from the "Disc Image Storage" category. In the File menu, look for Save As… or Export….
To convert VFD, DMG, OVA, IMA, VBOX, ADF, PVS, VHD, OVF, ISO, DSK or IMG files to CDI, try Padus DiscJuggler or another comparable tool in the "Disc Image Storage" category.
The CDI Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our CDI converter.