What is NRG? What Opens a NRG? File Format List from WhatIs.com

File Extension

NRG File Format

Image file (Nero)

NRG file format icon

NRG is a file extension for a disk image file format used by Nero. As a disk image, an NRG file contains an exact duplicate of the data stored on a disk. NRG typically stands for "energy."

Disk images are often used in disk backup programs as they do not lose the disk header information lost in a standard copy and paste. As such, they can be used to restore a disk’s information exactly as it had been.

If you come across an NRG file and do not have Nero it can be converted to the more common ISO format using NRG2ISO.


Learn more about NRG files:

Kevin Beaver explains using disk imaging for backup and recovery.

Visit the NRG2ISO webpage.

Visit the Nero webpage.

Search for answers to NRG-related questions at IT Knowledge Exchange.

This was last updated in August 2010
Editorial Director Margaret Rouse

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