PowerISO is an application used to create, open, mount / emulate, compress, encrypt, and otherwise manipulate CD / DVD image files. It is most commonly known for its proprietary DAA disc image format. Other supported formats include ISO, BIN, NRG, and CDI. PowerISO is able to modify all supported CD images formats, most notably ISO. The trial version cannot create or edit images greater than 300 megabytes, but can burn files of any size to disc. The maximum file size PowerISO can process is 256GB.