Open QCOW file

The most common choise: QEMU Copy-On-Write data

How to open QEMU Copy-On-Write data .qcow files

Have you had trouble opening the qcow file on your computer? What are qcow files? We explain what they are and recommend software that we know will open them.

What is qcow file?

A qcow file extension is related to the QEMU Copy-On-Write file format used to store disk images.

QEMU Copy-On-Write data description

The qcow image format is one of the disk image formats supported by the QEMU processor emulator. It is a representation of a fixed size block device in a file. Benefits it offers over using raw dump representation include:

  • Smaller file size, even on filesystems which don't support holes (i.e. sparse files)
  • Copy-on-write support, where the image only represents changes made to an underlying disk image
  • Snapshot support, where the image can contain multiple snapshots of the images history
  • Optional zlib based compression
  • Optional AES encryption

Suggested software to open qcow file

Qemu Manager

A management tool for the QEMU emulator


A generic machine emulator and virtualizer

What file extension actually is?

Simply put, file extensions are the characters after the dot in the computer file name, so for example document-name.pdf has file extension „pdf“. This helps Windows to identify which program should be used to open the file.

We can help you to open your file

Our database contains a huge list of different file extensions, usually with detailed description and programs that can be used to open or otherwise work with that particular file type.

Only original software

Every software listed in our database is verified and ve provide link to the developer or to the software own website, which should hopefuly be enough for you to download the most recent version of the program.