Having problems opening a cso file?

Find out what programs can help open, view, play or convert your cso files.

Opening cso files
Compressed ISO Disk Image

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

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What is cso file?

Compressed .ISO disk image format used for archiving PlayStation Portable (PSP) games; may include up to nine levels of compression, but higher amounts of compression may cause the disk image to load slowly.

Software that will open, convert or fix cso files

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