Free online OVA to VHD converter
Convert an OVA appliance disk to VHD for use with Hyper-V and other VHD-compatible tools.
Convert OVA to VHD online - free
Your file is processed instantly and deleted as soon as you download it.
Import a file from a URL
Paste a direct link to the file. We download it to our server and it is converted exactly like an upload.
How it works
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Upload your .ova file
Click to browse to select your file you want to convert or simply drag & drop your file into selected area.
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Perform .ova to .vhd conversion
After successful file upload, click to convert when you are ready.
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Download converted .vhd file
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How to convert ova to vhd file
- Virtualization
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Hyper-V uses VHD or VHDX, while VirtualBox and VMware commonly export appliances as OVA files. Converting the virtual disk inside the OVA lets you attach the existing guest system to a Hyper-V virtual machine without reinstalling it.
What the OVA format is
OVA is a TAR archive containing an OVF virtual-machine description, one or more virtual disks, and sometimes manifest or certificate files. VirtualBox, VMware, and other virtualization platforms use it to package appliances for transport, backup, and deployment.
The disk inside an OVA is commonly VMDK, but an appliance can contain VHD, VDI, or multiple disks. A VMDK may consist of a small descriptor file plus one or more extent files. The OVA archive itself is not a virtual hard disk, so changing its filename to .vhd does not convert it.
What the VHD format is
VHD is Microsoft’s virtual hard-disk format. Hyper-V, VirtualBox, Virtual PC, and several disk-management tools can attach it as a guest disk containing partitions and filesystems.
VHD supports dynamically expanding and fixed disks and remains useful for older Hyper-V and VirtualBox compatibility. Its practical virtual-capacity limit is about 2,040 GB. Use VHDX for modern Hyper-V deployments, disks larger than 2 TB, improved metadata protection, and better resilience against power loss; older software may not support VHDX.
Convert the OVA with VirtualBox
VirtualBox is the simplest desktop option when the OVA contains a VMDK. The conversion changes the disk container; it does not recreate the appliance’s VM settings.
- Install Oracle VirtualBox, which includes
VBoxManage, on Windows, Linux, or macOS. - Extract the OVA to a working directory without changing its files. Use
tar -xf appliance.ova -C extractedon systems with TAR support, or open the archive with 7-Zip on Windows. - Open the extracted OVF in a text editor and inspect its
ovf:hrefentries. Identify every referenced disk. Keep each VMDK descriptor and its referenced extent files together. - Convert each required disk with:
VBoxManage clonemedium disk "extracted/disk.vmdk" "converted/disk.vhd" --format VHD --variant Standard
--variant Standard creates a dynamically expanding VHD. Use --variant Fixed for a preallocated disk, provided the host has free space equal to the disk’s declared capacity. On Windows, use backslashes or quoted full paths as needed; if VBoxManage is not on the PATH, run "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" with the same arguments.
- Repeat the command for every disk listed by the OVF. Preserve the OVF disk order when attaching the disks to the new VM.
- Create a new VM in Hyper-V Manager and choose Generation 1 for a legacy BIOS guest or Generation 2 for a UEFI guest. Use the OVF’s firmware setting rather than guessing from the disk format.
- Attach the converted disk. A Generation 1 boot disk normally belongs on the IDE controller; a Generation 2 boot disk belongs on the SCSI controller. Add secondary disks according to the guest’s original controller arrangement where possible.
- For a Generation 2 Windows guest, select an appropriate Secure Boot template or disable Secure Boot temporarily if the guest bootloader is not trusted. Recreate the original CPU, memory, network, firmware, controller, and boot-order settings manually.
Convert a disk with QEMU
QEMU’s qemu-img is suitable for Linux systems and scripted conversions. Run it against the VMDK descriptor while all referenced extent files remain available:
qemu-img convert -p -f vmdk -O vpc -o subformat=dynamic extracted/disk.vmdk converted/disk.vhd
Use subformat=fixed instead of subformat=dynamic for a fixed VHD. Check the result with:
qemu-img info converted/disk.vhd
For an OVA containing multiple disks, convert each disk separately; qemu-img does not recreate the OVF appliance definition.
Online converters and practical limitations
Online file converters are generally unsuitable for complete OVA-to-VHD work. An OVA can contain several related files, multi-gigabyte operating-system images, credentials, licenses, and private application data; many web services accept only individual disk formats and do not preserve OVF settings or multi-disk relationships. Do not upload a confidential appliance. For a nonconfidential single-disk conversion, use an online service only when its current format list explicitly supports the required VMDK-to-VHD conversion, and verify its retention and deletion policy.
The conversion does not change the guest operating system’s drivers, boot mode, activation state, or virtual hardware assumptions. Windows may request reactivation. A guest can fail to boot when its firmware mode, storage controller, disk order, or bootloader differs from the source VM. Linux guests normally include the required Hyper-V drivers in current kernels, but older installations may need Hyper-V integration components or a regenerated initramfs.
Attach the VHD to a test VM before deleting the OVA. Confirm that the VM boots, every partition is present, network and storage devices work, and applications can read their data.
OVA vs VHD: format comparison
How the OVA and VHD formats compare on the properties that matter most for this conversion.
| Property | .OVA Open Virtual Appliance | .VHD Virtual Hard Disk |
|---|---|---|
| Compression | Both | Both |
| Encryption | No | — |
| Split archives | No | — |
| Bootable | No | Yes |
| Operating system support | Wide | Wide |
| Typical file size | Large | Large |
| Open standard | Yes | Partly open |
| Introduced | 2009 | 2005 |
| Developer | Oracle Corporation (originally VMware OVF initiative) | Microsoft |
| MIME type | application/ovf | application/x-vhd |
Information about file extensions and file types is provided by File-Extensions.org
Suggested software and links: ova to vhd converters
Frequently asked questions
Is the OVA to VHD converter free?
Yes, converting OVA to VHD on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my OVA file be?
You can upload OVA 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 OVA to VHD?
No. The OVA to VHD 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 OVA file for this OVA to VHD 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.
Will converting an OVA to VHD keep my virtual machine files?
The files and filesystem data on the selected virtual disk are normally preserved, but the OVA's appliance settings are not. CPU, memory, network configuration, snapshots, and other OVF metadata must be recreated in the software that uses the VHD.
Can an OVA with multiple disks be converted to one VHD?
No, one VHD represents one virtual disk, so an OVA containing several disks cannot be fully represented by a single VHD. Each disk may need to be converted separately, while the original disk order and controller settings must be configured again.
Why does my converted VHD not boot?
A converted VHD may not boot if the guest operating system expects a different disk controller, firmware mode, or partition setup than the destination virtual machine provides. The OVA's original virtual hardware configuration is not carried into the VHD, so those settings may need to match the guest system.
Will converting OVA to VHD make the virtual disk smaller?
Not necessarily; the result depends on whether the source disk is sparse or preallocated and on the chosen VHD allocation style. Unused blocks may be preserved or compacted differently, so the VHD's physical size can increase or decrease even though its virtual capacity stays the same.