Initially UltraISO was shareware however since 2006 it has turned 'Premium' and become chargeable.[2] The 'Free Trial' version is limited to ISO images of 300Mb or less [3]
Create a bootable USB flash or hard drive from a bootable disc image (works only with DOS, Windows NT and syslinux boot sectors). For this, the user can open an ISO image with UltraISO and choose choose 'Bootable' and 'Write disk image' to burn onto a bootable USB disk.
Converts: .BIN, .IMG, .CIF, .NRG, .BWI, .DAA, .DMG, .HFS and other formats to the standard ISO image.
Supports all ISO 9660 levels and the Joliet extension.
Optimization of ISO image file structures to save disc space.
UltraISO uses a proprietary format known as ISZ. The format advertised as "ISO Zipped", even though it is not a simple zip archive. The format uses zlib or bzip2 to compress the data, and can support AES encryption of various strength. The file format specification is available publicly on EZB Systems's website.[5] The format is now supported by third party applications such as Daemon Tools and Alcohol 120%.
