VMware has VMX format which works for VMware products. The other commonly found format which is OVF, as this is a open standard (OVA is OVF but compressed into a single file). There are times where converting between the two formats is required.

In order to convert from VMware’s VMX to a OVA file, we will use ovftool. If you already have either VMware workstation or VMware fusion pre-installed, you may already have it (else it can be downloaded as a standalone program for free). Its default locations are:

• Linux: /usr/bin/ovftool
• OS X/macOS: /Applications/VMware Fusion.app/Contents/Library/VMware OVF Tool/ovftool
• Windows: C:\Program Files (x86)\VMware\VMware Workstation\OVFTool\ovftool.exe

We will be using the official Kali Linux VMware image to convert. To start with unzip it to get access to the vmx within:

kali@kali:~$ 7z x kali-linux-2024.3-vmware-amd64.7z
[...]
kali@kali:~$
kali@kali:~$ ls kali-linux-*-vmware-amd64.vmwarevm/*vmx
kali-linux-2024.3-vmware-amd64.vmwarevm/kali-linux-2024.3-vmware-amd64.vmx
kali@kali:~$

We can now start to convert by doing the following:

kali@kali:~$ ovftool kali-linux-*-vmware-amd64.vmwarevm/*vmx kali-linux-rolling-amd64.ova
Opening VMX source: kali-linux-2024.3-vmware-amd64.vmwarevm/kali-linux-2024.3-vmware-amd64.vmx
Opening OVA target: kali-linux-rolling-amd64.ova
Writing OVA package: kali-linux-rolling-amd64.ova
[...]
Transfer Completed
Completed successfully
kali@kali:~$
kali@kali:~$ file kali-linux-rolloing.ova
kali-linux-rolloing.ova: POSIX tar archive
kali@kali:~$ ls -lah kali-linux-rolloing.ova
-rw-r--r-- 1 kali kali 3.4G Nov 10 23:18 kali-linux-rolloing.ova
kali@kali:~$

That’s it!

The OVA file can be now move and used where needed such as to ESXi (if the in-built upload feature is not working) or migrate to VirtualBox (You may need to install Guest Addition if so).