The File Extensions Database

.CISO File Extension

  • Category: Disk Image Files
  • Format: Binary

What is an .CISO file?

.CISO is Compact ISO File

CD or DVD disc image image container format designed for efficient storage and distribution of CD/DVD images; contains an exact duplicate of data from the original disc, without unnecessary "junk data."

CISO files are commonly used to store Wii games. The CISO file is the same as an .ISO file except it is compact, which means it removes all the "junk data" used to pad Wii games to make them appear as full discs. The CISO format features password based encryption and digital signing for software distribution.

Programs that open Compact ISO File
Wii Backup Manager

How to solve problems with CISO files

  • Associate the CISO file extension with the correct application. On :
    Windows: Right click on any CISO file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CISO files". Mac: Right click (or Ctrl-click) the CISO file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .CISO is Compact ISO File. Because only the current version supports the latest CISO file format. Search, therefore, e.g. on the N/A manufacturer website after an available .CISO is Compact ISO File update.
  • To make sure that your CISO file is not corrupted or virus-infected, get the file again and scan it with antivirus software.