.QCOW File Extension

.QCOW File Extension

File Type

QEMU Copy On Write Disk Image

Developer N/A
4.1  |  18 Votes
Category Disk Image Files
Format Binary

What is a QCOW file?

Disk image file saved in the QEMU Copy On Write (QCOW) format, a format used by QEMU virtualization software; stores the contents of a virtual machine's hard drive; supports zlib compression and AES encryption of separate, independent clusters.

More Information

QEMU differs from other virtualization policies that allocate fixed amounts of disk space, in which some of the empty space may go unused. QEMU's strategy delays allocation of storage until the disk space is needed, which allows for smaller file sizes.

NOTE: The QCOW format has been replaced by the QCOW2 format, which uses the .QCOW2 file extension.

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Programs that open QCOW files

Updated March 14, 2014

Verified by FileInfo.com

The FileInfo.com team has independently researched the QEMU Copy On Write Disk Image file format and Windows and Linux apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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