CISO file format description

Many people share .ciso files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ciso file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ciso files.

2 filename extension(s) found in our database.

.ciso - Wii Compressed ISO Image

The CISO disk image files are related to Wiimms ISO Tools. The CISO file is a Wii Compressed ISO Image. The Wii is a home video game console released by Nintendo.

Wiimms ISO Tools
Disk Image files
- / -
Wii Compressed ISO Image related extensions:
Saved Master Boot Record
ZIP Compressed ISO Image
Virtual CD Image
CloneCD Sub Channel Data
VeraCrypt Container Data
Interchangeable Preservation File

.ciso - PT ISO Tool Compressed Image

The CISO disk image files are related to PT ISO Tool. The CISO file is a PT ISO Tool Compressed Image. PT ISO is a command line utility that allows users to create and convert Compact File Sets and CD/DVD image files between ISO, Compact ISO (CISO), and Compact File Set (CFS) formats.

Disk Image files
- / -
PT ISO Tool Compressed Image related extensions:
Wii U Disc Image
Winclone Image
Mac OS X New Disk Image Format Image
gBurner Image
MSX Disk Image
SquashFS Image

Naturally, other applications may also use the .ciso file extension. Even harmful programs can create .ciso files. Be especially cautious with .ciso files coming from an unknown source!

Can't open a .ciso file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .ciso file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cio, cis, cso, iso, xiso

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

CALS ISO 8613 Bitmap
CheckInbox Settings
Fire Dynamics Simulator Iso-surface Data
CSO Compressed PSP ISO Image
InstallShield Uninstall Data
High Level Shader Language Compiled Bytecode

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .ciso file format, then write to us! >> CISO file