StarWind V2V / P2V Converter Version 9 (build 848) – Multi-VM Conversions

If you’re managing a datacenter or designing infrastructure and still working across platforms like VMware ESXi, Microsoft Hyper-V, Proxmox, oVirt, or even Oracle VirtualBox—or handling migrations between on-prem environments and cloud providers such as Azure and AWS—you’re likely familiar with how frustrating VM conversions can be. Manual export/import steps, temporary storage overhead, service downtime, and the risk of data corruption during format changes all make the process far from smooth.

StarWind has steadily refined its free StarWind V2V Converter over the years, and the latest update (Version 9, build 848, released on November 24, 2025) makes it even more suitable for real-world production use. This version introduces the ability to process multiple virtual machines simultaneously, delivers a fully developed CLI that works consistently across major hypervisors, improves the reliability of live (hot) migrations, and enhances cloud migration workflows. And notably, it remains completely free—no hidden licensing limitations or intrusive telemetry.

I’ve personally relied on this tool since the early days of VHD-to-VMDK conversions—back when VMware Converter required a full Hyper-V setup just to perform basic tasks. Now, let’s dive deeper into what’s new in this release and how it can be effectively integrated into modern datacenter operations.

What’s New in Version 9 (build 848)

StarWind didn’t just bump the version number. The changelog shows real production-grade enhancements:

• Multi-VM conversion – finally! You can queue and run several VMs simultaneously instead of babysitting one wizard at a time.
• Improved P2V to Proxmox and ESXi with automated driver injection for Windows guests (huge time-saver on oVirt/OLVM too).
• Enhanced Azure and AWS cloud conversions – better SDK handling, faster sync, and fewer credential headaches.
• Windows Server 2025 VM support fully validated.
• Proxmox 9.0 compatibility.
• Live/hot VM synchronization fixes between ESXi Hyper-V (the delta sync now handles edge cases much cleaner).
• CLI expansions – full VM-level convert support for Hyper-V, ESXi, and Proxmox (disk-only CLI was added earlier, but now it’s complete for entire VMs).

Other long-standing niceties remain: direct conversion without intermediate copies, snapshot-based hot migration (zero downtime for running VMs), and preservation of BIOS/UEFI boot type checks.

Core Capabilities You’ll Actually Use in the Datacenter

• V2V – ESXi Hyper-V Proxmox oVirt VirtualBox. Formats: VMDK (thin/thick/stream-optimized), VHD/VHDX (thin/thick), QCOW2 (including v3), IMG, RAW, VDI.
• P2V – Physical disks or entire machines straight into any of the above hypervisors or cloud. Perfect for decommissioning old physical servers without rebuilding them.
• Cloud round-trip – On-prem Azure AWS. Great for “cloud cost too high, bring it back” scenarios or hybrid bursting.
• Hot migration – Keep the source VM running while the converter syncs deltas. I’ve used this successfully on production Hyper-V to ESXi moves with <1 minute cutover.

All of this runs on a simple Windows machine (x64, admin rights required). No agents on source/target in most cases.

GUI Is Still Great for One-Offs – But CLI Is Where the Real Power Is

The wizard is clean and familiar: select source (local file, remote ESXi, Hyper-V host, Proxmox, physical disk, etc.), pick target, choose format/thin provisioning, and go. It even shows progress per disk and handles checkpoints on Hyper-V nicely.But the question you asked – can you script this? – the answer is a resounding yes. StarWind ships V2V_ConverterConsole.exe (located by default in C:\Program Files\StarWind Software\StarWind V2V Converter) and it has been production-ready for automation for years. Recent releases just extended it to full VM conversions across Proxmox, oVirt, etc.

You run it from an elevated Command Prompt (or wrap it in PowerShell/Batch for mass migrations).

Basic syntax:

    V2V_ConverterConsole.exe convert parameter1=value1 parameter2=value2 …

Key parameters (most have sensible defaults):

• in_host_type / out_host_type = esx | win | local | proxmox (and oVirt/OLVM in newer builds)
• in_host_address, in_host_username, in_host_password
• in_vm_name or in_file_name (for local files or physical disks use \\?\PhysicalDiskX)
• out_vm_name, out_vm_path, out_file_name, out_file_type (ft_vhdx_thin, ft_vmdk_esx_thin, ft_qcow2, etc.)
• Proxmox-specific: out_proxmox_storage, out_proxmox_node, out_proxmox_vmid

Real-World CLI Examples

1. Hyper-V to Proxmox (full VM, QCOW2)

V2V_ConverterConsole.exe convert in_host_type=win in_host_address=192.168.10.10 in_host_username=admin in_host_password=Passw0rd in_vm_name=SQL01 out_host_type=proxmox out_host_address=192.168.10.20 out_host_username=root out_host_password=Passw0rd out_vm_name=SQL01 out_proxmox_storage=vms out_proxmox_node=prox1 out_proxmox_vmid=501 out_file_type=ft_qcow2

2. ESXi to Hyper-V (hot migration)

V2V_ConverterConsole.exe convert in_host_type=esx in_host_address=esx01.lab.local in_host_username=root in_host_password=Passw0rd in_vm_name=WebApp01 out_host_type=win out_host_address=hv01.lab.local in_host_username=admin in_host_password=Passw0rd out_vm_name=WebApp01 out_vm_path=E:\VMs out_vm_os=Windows

3. Local file conversion (VMDK to VHDX thin)

V2V_ConverterConsole.exe convert in_file_name=D:\oldvm\disk1.vmdk out_file_name=E:\newvm\disk1.vhdx out_file_type=ft_vhdx_thin

4. Batch/PowerShell wrapper idea (for mass migration – just loop through a CSV of VM names) You can throw these into a .bat or PowerShell foreach and run dozens overnight. The tool returns proper exit codes, so you can even build proper error handling and logging.

Pro tip: use a config file (-c config.cfg or @config.cfg) if you hate long command lines – great for repeatable jobs.

Installation and Requirements

Dead simple:

1. Download from https://www.starwindsoftware.com/starwind-v2v-converter
2. Run the .exe (no reboot needed)
3. Done.

Runs on any modern Windows desktop or server. For remote ESXi/Proxmox you obviously need network access and credentials. P2V works best with the source machine shut down (or use hot mode where supported).

Who Should Be Using This in 2026?

• Anyone doing hypervisor consolidation (VMware → Hyper-V or Proxmox).
• Architects moving workloads back from Azure/AWS because of cost.
• Teams doing physical server retirement (P2V).
• Automation lovers who want to script mass conversions instead of clicking wizards at 2 a.m.

The fact that it’s still 100% free in 2026 is almost suspicious – but StarWind has been doing this for over a decade. No hidden limits, no “enterprise” upsell for basic conversions.

Final Words

If you haven’t looked at StarWind V2V Converter lately, download the latest Version 9 today. The combination of multi-VM support, rock-solid hot migration, and fully scriptable CLI makes it the most practical free conversion tool available for real datacenter work. I’ve used it on everything from small labs to multi-hundred-VM migrations and it just works.

• Grab it here: https://www.starwindsoftware.com/starwind-v2v-converter
• Release notes for the full changelog: https://www.starwindsoftware.com/v2v-converter-release-notes
• CLI help: https://www.starwindsoftware.com/v2v-help/CommandLineInterface.html