How to open CISO files

Did your computer fail to open a CISO file? We explain what CISO files are and recommend software that we know can open or convert your files.

What is a CISO file?

CISO files are CISO Compressed ISO CD image files, which you can read more about below.

The CISO file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a CISO opener may not be able to open all kinds of CISO files. In this case, though, we only know of one specific use.

CISO Compressed ISO CD image

Through our analysis of CISO files, we know that one use of the format is CISO Compressed ISO CD image. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!