NRG (file format)
| Filename extension |
.nrg |
|---|---|
| Uniform Type Identifier (UTI) | com.nero.nrg-image |
| UTI conformation | public.iso-image, com.apple.disk-image, public.archive, public.data, public.item, public.disk-image |
| Developed by | Nero AG |
| Type of format | disk image |
| Container for | filesystem and volumes |
An NRG file is a proprietary optical disc image file format originally created by Nero AG for the Nero Burning ROM utility. It is used to store disc images. Other than Nero Burning ROM, however, a variety of software titles can use these image files. For example, 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 a .nrg extension and a header attached. They can store audio tracks for Audio CDs, which ISO images cannot. Nero's NRG format is one of the few formats besides BIN/CUE, Alcohol 120%'s MDF/MDS and CloneCD's CCD/IMG/SUB disc image formats to support Mixed Mode CDs which contain audio CD tracks as well as data tracks.