CL is the extension of files used to store the set of cursors for the Windows operating system. CL files are created in IconUtils. The user can create his own CL cursor library and define it as the default for the system. Such an operation can also be performed directly from the IconUtils application. CL files can be exported to the CUR format.

IconUtils is a Windows based utility developed by Aha-Soft. It allows you to create both static and dynamic cursors.