Convert VMX to OVF and Convert OVF to VMX: Complete Step-by-Step Guide — VMware Convert OVF to VMX and VMX to OVF Explained

VMX is a VMware virtual machine configuration file, while OVF is an open, portable format for packaging and distributing VMs. Converting between them is essential for migration, backup, and interoperability.

VMware’s ovftool provides the official way to perform these conversions, ensuring VM settings, disks, and metadata remain intact. This guide shows how to convert VMX → OVF and OVF → VMX step by step, with practical examples for administrators.

VMX to OVF Converter: Installing VMware OVF Tool

What Is VMware OVF Tool (ovftool)?

VMware ovftool is a free command‑line utility for:

• Converting VM formats: VMX → OVF/OVA, OVF/OVA → VMX.
• Validating OVF/OVA packages.
• Deploying VMs directly to ESXi or vCenter hosts.

It ships bundled with VMware Workstation and VMware Fusion, and is also available as a standalone download for Windows, Linux (32/64‑bit), and macOS.

How to Download and Install ovftool

• Download:
  • Available from the Broadcom support portal (VMware account required).
  • Search for “OVF Tool” under VMware vSphere SDKs and Tools.
• Windows installation:
  • Installer: .msi package.
  • Default path: C:\Program Files\VMware\VMware OVF Tool\.
  • No GUI icon — use Command Prompt or PowerShell.
• Linux installation:
  • Download .bundle installer.
  • Run:

chmod +x VMware-ovftool-*.bundle
sudo ./VMware-ovftool-*.bundle

• • Default path: /usr/bin/ovftool.
• macOS installation (with VMware Fusion):
  • Already bundled.
  • Path: /Applications/VMware Fusion.app/Contents/Library/VMware OVF Tool/ovftool.
• Verify installation:

ovftool --version

ovftool /path/to/my_vm.vmx /path/to/output/my_vapp.ovf

cd "C:\Program Files\VMware\VMware OVF Tool"

ovftool.exe "C:\VMs\MyVM\MyVM.vmx" "C:\OVF_Output\MyVM.ovf"

Opening VMX source: C:\VMs\MyVM\MyVM.vmx
Opening OVF target: C:\OVF_Output\MyVM.ovf
Writing OVF package: C:\OVF_Output\MyVM.ovf
Transfer Completed
Completed successfully

ovftool ~/vms/MyVM/MyVM.vmx ~/ovf_output/MyVM.ovf

"/Applications/VMware Fusion.app/Contents/Library/VMware OVF Tool/ovftool" ~/vms/MyVM/MyVM.vmx ~/ovf_output/MyVM.ovf

ovftool.exe "C:\VMs\MyVM\MyVM.vmx" "C:\OVA_Output\MyVM.ova"

ovftool ~/vms/MyVM/MyVM.vmx ~/ova_output/MyVM.ova

How to Convert OVF to VMX: Step‑by‑Step Guide

Why Convert OVF to VMX?

OVF‑to‑VMX conversion is required when:

• Deploying a downloaded virtual appliance (OVF/OVA) to VMware Workstation or Fusion for local use.
• Importing a VM from a non‑VMware platform into a VMware environment.
• Re‑establishing a VMX runtime configuration from an OVF archive after migration.
• Working around vCenter deployment failures by converting to VMX first, then re‑importing.

Convert OVF File to VMX on Windows

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1. 1. Install ovftool (see installation section). Open Command Prompt as Administrator.
2. 2. Create a clean destination directory for the VMX output. Do not use the same directory as the source OVF — otherwise ovftool fails with “File already exists”.
3. 3. Run conversion:

ovftool.exe "C:\OVF_Source\MyVM.ovf" "C:\VMX_Output\MyVM.vmx"

1. 4. Monitor output:

Opening OVF source: C:\OVF_Source\MyVM.ovf
The manifest validates
Opening VMX target: C:\VMX_Output\MyVM.vmx
Writing VMX file: C:\VMX_Output\MyVM.vmx
Transfer Completed
Completed successfully

1. 5. Open VMware Workstation, select Open a Virtual Machine, navigate to the output directory, and open the new .vmx file.

Convert OVF to VMX on Linux and macOS

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1. 1. Create a separate output directory:

mkdir ~/vmx_output

1. 2. Run conversion:

ovftool ~/ovf_source/MyVM.ovf ~/vmx_output/MyVM.vmx

1. 3. Verify output directory contains .vmx and new .vmdk file(s).
2. 4. Register the VM in VMware Workstation or import to ESXi as needed.

Converting OVA to VMX (Single Archive Source)

OVA files follow the same syntax — specify .ova as the source:

• Windows:

ovftool.exe "C:\OVA_Source\MyVM.ova" "C:\VMX_Output\MyVM.vmx"

• Linux/macOS:

ovftool ~/ova_source/MyVM.ova ~/vmx_output/MyVM.vmx

ovftool extracts the OVA archive, validates the manifest, and writes the VMX + VMDK files to the output directory.

⚠️ Note: VirtualBox‑generated OVA files may trigger compatibility warnings. These can often be ignored, but check the error reference section for handling specifics.

When VM Files Are Damaged or Lost During Conversion: VMFS and VMDK Recovery

How Conversion Operations Can Leave VM Data at Risk

• VMX → OVF conversion failure — interrupted writes may leave VMDK files partially written, appearing complete but corrupted at the tail end.
• OVF → VMX conversion failure — the process may overwrite the original VMDK before completion, leaving neither source nor destination usable.
• Storage failure mid‑conversion — on VMFS datastores, this can corrupt VMFS metadata, making the entire datastore inaccessible, not just the VM being converted.

What to Do When VMFS Data Becomes Inaccessible After a Failed Conversion

• Do not re‑run conversion immediately — repeated writes risk overwriting recoverable data.
• Stop all write activity to the affected storage.
• Run a VMFS‑level scan to assess damage.
• Use a dedicated recovery tool before attempting further conversion.
• Remember: ovftool error messages only confirm conversion failure, not the condition of underlying VMDKs.

Recovering VMFS and VMDK Data with DiskInternals VMFS Recovery™

DiskInternals VMFS Recovery™ is purpose‑built for VMware recovery scenarios:

• Direct VMDK mounting without a running ESXi host — critical when the hypervisor is unavailable and only raw storage remains.
• VMFS volume reconstruction from damaged or partially overwritten metadata.
• Recovery of deleted VMDK files after accidental overwrites.
• File preview before extraction to confirm integrity.

Workflow:

1. 1. Connect DiskInternals VMFS Recovery™ to the affected VMFS volume.
2. 2. Run a full scan to rebuild datastore metadata.
3. 3. Locate intact VMDK files in the recovery browser.
4. 4. Preview contents to verify integrity.
5. 5. Extract to a safe destination.
6. 6. Re‑attempt the VMX → OVF conversion only after recovery is complete.

Deploying the Converted OVF or VMX: Next Steps After Conversion

Deploying an OVF to VMware vSphere

• In the vSphere Client:
  • Right‑click the target cluster or host → Deploy OVF Template.
  • Select the converted .ovf or .ova file.
  • Follow the wizard to assign datastore, network, and storage policy.
• For large OVF deployments, bypass browser upload limits by using ovftool directly:

ovftool --noSSLVerify MyVM.ovf vi://root@esxi-host.domain.com

Opening a Converted VMX in VMware Workstation

• In VMware Workstation: File → Open → navigate to the output .vmx file.
• At the “Did you move or copy this VM?” prompt:
  • Select “I Moved It” to preserve the existing UUID and MAC address.
  • Avoid “I Copied It”, which generates new identifiers and may break guest OS licensing or domain network configurations.

Registering a Converted VMX on ESXi via the Datastore Browser

• Upload the converted VMX and VMDK files to an ESXi datastore using the Datastore Browser.
• Once uploaded:
  • Right‑click the .vmx file → Register VM.
  • The VM appears in the ESXi inventory and is ready to power on.

FAQ