Convert OVA to ISO
Extracting and converting of disk images from OVA virtual machines.
Convert OVA files online
We don’t have a dedicated online converter for OVA to ISO yet, but you can convert OVA files online to these formats:
How to convert ova to iso file
- Virtualization
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Everything points to the fact that users searching for ova to iso conversion are looking for a way to extract and/or convert disk images from OVA virtual machine and save these as ISO disk images. A fundamental difference between OVA and ISO formats makes steps to directly convert ova to iso a bit complicated, but not impossible. Compared to ISOs, which are just disk images, OVA format is used to store all kinds of data for the virtual machine, including the disk image (in various formats), as well as configuration files (OVF), and other settings.
Of course, you can just launch the original virtual machine (OVA package) using VirtualBox, explore the contents of virtual drives, and manually copy out the contents to build ISO compilation. But sometimes, you do not want to launch the machine with the settings saved in OVA files.
In some cases, users, especially Linux users, are interested in making bootable ISO images from the OVA package.
How to recover and convert disk images from OVA packages
Extracting OVA package
First, extract the disk images from the OVA package and export them to ISO format. OVA format is pretty much just a renamed TAR archive, which means you can extract it using any suitable file archiver, such as 7-zip or WinRAR. Once you do that, you will get an OVF folder that contains a single .ovf file and any disk images that were part of the OVA package, typically in VMDK (VMWare) or VDI (VirtualBox) format.
Exploring VDI / VMDK images
Now comes the hardest part: making the actual ISO. Due to the different nature of these disk images, it is not possible to do this directly, but there is still a way to produce an ISO image from the data. You have to use a tool that can browse .vmdk or .vdi files, something like the shareware tool WinImage, or mount the disk images using QEMU, VirtualBox, or VMWare.
Making ISO disk image
Once this is done, copy out any files you want for your ISO compilation and build it with suitable software.
How to create bootable ISO from OVA files
The process of making a bootable .iso image is similar to data recovery, but it requires a more refined approach and specific tools. There are probably several ways to achieve an ova-to-iso conversion this way; here is one example.
1. Extract the OVA Package with WinRAR or 7-ZIP. Remember, it's just a renamed TAR archive. Again, you are looking for the disk images (VDI or VMDK).
2. Convert the Disk Image to ISO-Compatible Format; QEMU should be sufficient for this task.
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You can do this with the following command: qemu-img convert -O raw source.vmdk target.img
3. If you need the ISO to be bootable (e.g., for installing an OS), ensure that the original disk image from the OVA package is a bootable image with an OS installed. The ISO's bootability depends on whether the original disk image was bootable (has proper content). Now, you just need to create a bootable disk image from the raw disk image data.
- In Linux you can use the dd command to convert the raw disk image to ISO, i.e. dd if=target.img of=final.iso
- In Windows, you can use any disk image utility or burning software to create ISO disk images from raw disks.
OVA vs ISO: format comparison
How the OVA and ISO formats compare on the properties that matter most for this conversion.
| Property | .OVA Open Virtual Appliance | .ISO ISO 9660 disc image |
|---|---|---|
| Compression | Both | Uncompressed |
| Encryption | No | No |
| Split archives | No | — |
| Bootable | No | Yes |
| Operating system support | Wide | Wide |
| Typical file size | Large | Very large |
| Open standard | Yes | Yes |
| Introduced | 2009 | 1988 |
| Developer | Oracle Corporation (originally VMware OVF initiative) | ISO / ECMA / optical disc industry |
| MIME type | application/ovf | application/x-iso9660-image |
Suggested software and links: ova to iso converters
Frequently asked questions
Will converting an OVA to ISO preserve the virtual machine settings?
No. An ISO does not preserve the OVA's OVF configuration, virtual hardware settings, snapshots, or appliance metadata; it can only contain files or an optical-disc filesystem.
Will my OVA virtual disk become a bootable ISO?
Usually not. OVA virtual disks such as VMDK files use a different disk format from ISO images, so placing or extracting them into an ISO does not automatically make the ISO bootable or usable as a virtual machine disk.
Why does my OVA to ISO conversion fail or produce an ISO that will not boot?
The most common reason is that an OVA is a virtual-appliance archive, while an ISO must contain a suitable optical-disc filesystem and boot structure. A VMDK or other virtual disk inside the OVA may need separate conversion and boot preparation rather than simple repackaging.
What happens to multiple disks and files in an OVA converted to ISO?
They are generally stored as ordinary files inside the ISO, rather than remaining separate attached virtual disks. The resulting ISO may be larger or smaller depending on the source contents and compression, and it will not remain directly editable as an OVA appliance.