ISO Compressor is a free game ISO file compression software, it can compress and convert normal ISO image files to compressed image format CSO (CISO).

A cso file extension is used for a common disk format for Sony Playstation, similar to ISO. Very often used for backups of game disks. CSO format needs a special customized firmware so PSP can read them.

There is one other file type using
the CSO file extension!

.cso - Compiled Shader Object

Software that open cso file

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CSO file extension- CISO compressed ISO image

What is cso file? How to open cso files?

File type specification:

cso file icon:

The cso file extension is used for compressed ISO images. They are often used as a medium to play PSP games. The standard medium used by Sony PlayStation Portable is Universal Media Disc (UMD).

CSO format has nine levels of compression. Higher levels mean better compression, but slower loading times of compressed ISOs.

These cso files are created by PSP ISO Compressor.

CSO CISO compressed ISO file allows playing PSP games from memory card, but PSP must have installed user customized firmware, that includes support to reading of cso files.

Updated: August 1, 2019

The default software associated to open cso file:

Company or developer:
danny_kay1710

A front end converter for Windows, PSP ISO Compressor supports several ISO compression formats -- CSO, DAX, and the newly introduced JSO.

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Help how to open:

The *.cso file is compressed ISO image file and can be opened in SONY PlayStation Portable, that has installed user customised firmware with support to open the CSO CISO compressed ISO file.

How to convert:

PSP ISO Compressor supports conversion of *.cso files in to other disk file formats.

Find conversions from cso file:

Find converter to cso file type:

File identification strings:

HEX code: 43 49 53 4F
ASCII code: CISO

Related links:

List of software applications associated to the .cso file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open cso file, edit cso file, convert cso file, view cso file, play cso file etc. (if exist software for corresponding action in File-Extensions.org's database).

Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting cso files.

Software that open cso file - CISO compressed ISO image

Programs supporting the exension cso on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open cso file action.

.csoapplication/x-compressed-isoDeveloped byBoosterType of formatExtended fromjs.CSO is a method for the format. It is used to compress dumped games, and is an alternative to the compression method. It is also sometimes called 'CISO'.It was the first compression method for ISO. It was created so that more memory space can be saved. Booster created the first code; it was later optimized for better compression. Other formats tried to replace it by fixing up certain issues such as lag in games, such as.DAX and.JSO. Lg lx u250 manual usuario playstation 3.

However at the time, the popular application ' used CSO.DAX needed another loader, and.JSO was basically unused.CSO provides nine levels of compression. While the highest levels of compression can introduce slowdown and lengthy load-times in software which relies heavily on disc streaming, even the lower levels are capable of substantial compression. This is partially due to the data layout of a, though more frequently due to the use of as both an anti-piracy tool and a means to more optimally lay the data out physically on the disc.In addition to being used for compressing games, the PSP port of PicoDrive supports compressed disc images in the CSO format. References.