Disk images

VHD → VHDX

Learn about the formats: What is VHD? What is VHDX?

At a glance

ConvertX.am converts VHD files to VHDX online, for free and without signing up. Upload a file of up to 500 MB and download the VHDX result; uploaded and converted files are deleted automatically within about an hour.

Input:: VHD
Output:: VHDX
Price:: Free, no sign-up
File size:: Up to 500 MB
Your files:: Deleted automatically within about an hour

Convert your legacy Virtual Hard Disk (VHD) files to the modern VHDX format instantly. This tool helps system administrators upgrade older virtual machine storage to support higher capacities and improved performance.

VHD is the traditional Microsoft virtual disk format with a strict 2TB limit, while VHDX is the newer standard supporting virtual storage up to 64TB, better data alignment, and power failure resilience. During this conversion, your disk structure, partitions, and operating system files are safely translated into the advanced VHDX architecture without altering the underlying data sectors.

The conversion from VHD to VHDX is entirely lossless, meaning your data integrity, file systems, and boot records are preserved completely with zero quality degradation.

Tips

Ensure your Hyper-V host environment supports VHDX before upgrading older virtual machines.
Check available free disk space on your storage volume, as the output VHDX file size changes insignificantly compared to the original VHD.
Take a manual backup of your critical VHD image prior to initiating the conversion process.

Common use cases

Upgrading legacy Windows Server virtual machines from older VHD containers to modern VHDX architecture.
Expanding virtual disk storage capacity beyond the traditional 2TB limitation imposed by the old VHD format.
Preparing virtual machine images for deployment on newer Hyper-V hosts that optimize performance using VHDX features.

Why ConvertX stays free — forever

We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.

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Free tools today — and always

Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.

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Privacy-first processing

Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.