Convert CISO to ISO

CISO and ISO are both disk images used mainly for backup purpose. In case of .ciso files, these are very common in the gaming community, especially because the compressed file size of the CISO format allows for faster transfer and conservation of space. 

CISO image represents a zlib compressed ISO image featuring a lossless data compression with good ratio between speed and compression ratio.

How to convert CISO images back to original ISO

If you, for some reason, need or want to convert .ciso image back to standard .iso, you have plenty of sofware choices. Pretty much every file archiver that supports zlib format should be capable of this, but the best way how to convert ciso to iso is to use tools designed for this purpose.

Many tools for original PSP consoles exist (PPSSPP, UMDGen) as well as tools for Nintendo Wii (Wii Backup Fusion, Wii Unscrambler or Wii Backaup Manager).

Difference between CISO and CSO images

Despite what many users think, .ciso and .cso files are not the same formats and feature slightly different compression. CISO images date back to the times of original Sony PlayStation while CISO files are more used for Nintento Wii content. But modern emulators and disk image managers support both of these formats, just make sure you are using the one you need for your purposes.