Free online VDI to QCOW2 converter
Convert VirtualBox VDI disk images to QEMU QCOW2 format.
Convert VDI to QCOW2 online - free
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How to convert vdi to qcow2 file
- Virtualization
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Source format: VDI
VDI is the VirtualBox Disk Image format used by Oracle VM VirtualBox. It stores the contents of a virtual hard drive, including partitions, files, and operating system data. VDI is commonly used for VirtualBox virtual machines on Windows, macOS, and Linux. Typical use cases include creating VM disks, cloning systems, and moving a VirtualBox guest to another virtualization platform.
Target format: QCOW2
QCOW2 is the QEMU Copy On Write version 2 disk image format, widely used by QEMU, KVM, and many Linux virtualization stacks. Its main advantages are copy-on-write behavior, snapshots, optional compression, and support for thin provisioning. QCOW2 is a common choice for Linux servers, test environments, and virtual machine migration into QEMU-based platforms.
How to perform the conversion
The most reliable method is to use qemu-img, which is included with QEMU on most platforms. It can read VDI files directly and write QCOW2 images without needing to boot the virtual machine.
- Install QEMU tools if they are not already available. On Linux, this is often provided by a package such as
qemu-utils. On Windows and macOS, install a QEMU distribution that includesqemu-img. - Make sure the source VDI file is not in use by VirtualBox. Shut down the VM completely rather than suspending it.
- Run the conversion command:
qemu-img convert -f vdi -O qcow2 source.vdi target.qcow2 - If you want to verify the result, inspect the new image with
qemu-img info target.qcow2. - Attach
target.qcow2to a QEMU/KVM virtual machine or import it into your virtualization platform.
If you prefer a graphical workflow, some desktop virtualization tools can convert or clone disks, but qemu-img is usually the best choice because it is fast, scriptable, and preserves the disk contents accurately. You can also convert the file on 101convert.com for free, without installing any software.
Notes on quality, compatibility, or limitations
The conversion is usually lossless at the disk-image level: files and partitions are copied as-is into the new container format. However, the guest operating system may still need driver or bootloader adjustments after migration, especially if you move from VirtualBox to QEMU/KVM hardware emulation.
QCOW2 images may be smaller or larger than the original VDI depending on whether the source disk is dynamically allocated, how much free space it contains, and whether compression is used. Snapshot chains in VirtualBox are not always represented as a single VDI file, so if the VM uses snapshots, you should convert the current active disk or first consolidate the snapshot chain.
For best compatibility, keep the source VM powered off, ensure enough free disk space for the converted image, and confirm that the target platform supports QCOW2 before migration.
Note: This vdi to qcow2 conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
VDI vs QCOW2: format comparison
How the VDI and QCOW2 formats compare on the properties that matter most for this conversion.
| Property | .VDI VirtualBox Virtual Disk Image | .QCOW2 QEMU Copy On Write version 2 |
|---|---|---|
| Compression | Both | Both |
| Encryption | — | Yes |
| Bootable | Yes | Yes |
| Operating system support | Wide | Wide |
| Typical file size | Very large | Medium |
| Open standard | No | No |
| Introduced | 2007 | 2004 |
| Developer | Oracle (originally InnoTek / Sun Microsystems) | QEMU project / Fabrice Bellard and contributors |
Frequently asked questions
Is the VDI to QCOW2 converter free?
Yes, converting VDI to QCOW2 on 101convert.com is completely free. No registration, email address or installation is required.
How large can my VDI file be?
You can upload VDI files up to 2000 MB and convert up to 1 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert VDI to QCOW2?
No. The VDI to QCOW2 conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid VDI file for this VDI to QCOW2 conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.