Click the "Select File" button above, and choose your CISO file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert CISO to another file type
To convert your CISO file to another format, you need Wii Backup Manager or other Disk Image software.
Convert a file to CISO
To convert other file formats to the "Wii Game Backup" file type, you need software like Wii Backup Manager or a similar tool.
About CISO files
A .CISO (Compact ISO) file is a compressed disc image format primarily used for Nintendo Wii and GameCube games. It was designed to reduce the file size of standard ISO dumps by stripping away the dummy padding data - often gigabytes of zeros - that filled the original optical discs. While this was efficient for early hard drive storage, .CISO is now considered a legacy format. It is not natively supported by modern operating systems and lacks the advanced lossless compression features of the newer RVZ format used by the Dolphin Emulator.
Users typically encounter friction when trying to load .CISO files into modern USB loaders or emulators that prefer WBFS or RVZ. Additionally, because the format removes data required for the disc to be "valid" in the eyes of burning software, you cannot burn a .CISO directly to a DVD without first converting it back to a full-sized ISO. For playing on actual Wii hardware, converting to WBFS is the standard; for emulation, converting to RVZ or ISO ensures maximum compatibility and performance.
Convert.Guru analyzes your CISO file, detects the exact format, and lets you read the text inside.
If you want to convert CISO file to ISO, WBFS, IMG, DMG, VHD, VMDK, VDI, HDD, QCOW, QCOW2, RAW or VBOX, you can use Wii Backup Manager or similar software from the "Compressed Game Disc Image" 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 CISO, try Wii Backup Manager or another comparable tool in the "Compressed Game Disc Image" category.
The CISO 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 CISO converter.