Nrg

A .nrg file is a proprietary CD image file format used by Nero Burning ROM, a utility suite made by Nero AG, to create and burn ISO 9660 CD images. Other than Nero Burning ROM, a variety of software titles can use these image files. For example, Power ISO, Alcohol 120%, or Daemon Tools can mount NRG files onto virtual drives for reading. Contrary to popular belief .nrg files are not ISO images with .nrg extension and a header attached. For techni... more

A .nrg file is a proprietary CD image file format used by Nero Burning ROM, a utility suite made by Nero AG, to create and burn ISO 9660 CD images. Other than Nero Burning ROM, a variety of software titles can use these image files. For example, Power ISO, Alcohol 120%, or Daemon Tools can mount NRG files onto virtual drives for reading. Contrary to popular belief .nrg files are not ISO images with .nrg extension and a header attached. For technical details on the nrg format see below. There are several tools available to convert a .nrg data file into an ISO 9660 CD image. The file format specification below is unofficial and as such is lacking some data. There may also be errors. The nrg file format uses a variation of the Interchange File Format (IFF) and stores data in a chain of "chunks". All integer values are stored unsigned in big endian byte order. Version 1 nrg format stores values as 32bit integers. Nero Burning ROM v5.5 introduced a new nrg file format, version 2, with... less