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QCOW file extension

The table below provides useful information about the .qcow file extension. It answers questions such as:

  • What is the .qcow file?
  • What program do I need to open a .qcow file?
  • How can the .qcow file be opened, edited or printed?
  • How can I convert .qcow files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ QEMU Copy On Write Disk Image

QCOW file is a QEMU Copy On Write Disk Image. QEMU is a generic and open source machine emulator and virtualizer.
Category: Disk Image files
Application: QEMU
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
QCOW aliases:
QCOW related links:
QCOW related extensions:

Other types of files may also use the .qcow file extension.

🚫 The .qcow file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:


Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Cowsay Data

🔴 Can't open a .qcow file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .qcow file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .qcow file extension, write to us!

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