Disk images

VHDX → VMDK

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

At a glance

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

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

Convert your Microsoft Hyper-V VHDX disk images to VMware VMDK format instantly. This tool helps system administrators migrate virtual machines between hypervisors without complex manual reconfiguration.

VHDX is the modern virtual hard disk format used primarily by Microsoft Hyper-V, supporting up to 64 TB and robust data corruption protection. On the other side, VMDK is the native virtual disk architecture for VMware ESXi and Workstation environments. During conversion from VHDX to VMDK, the disk structure, partition tables, and boot sectors are translated so that VMware hypervisors can natively mount and execute the virtual machine storage.

The conversion between VHDX and VMDK is lossless, meaning file data and internal structures remain completely intact with no quality loss. The final file size changes only insignificantly due to metadata formatting differences between Microsoft and VMware.

Tips

Ensure the source VHDX disk is fully detached from Hyper-V and not in a saved state before converting.
Check your VMware hypervisor version compatibility to select the correct VMDK virtual disk sub-format.
Verify free storage space on your target drive, as temporary extraction during conversion may require extra room.

Common use cases

Migrating on-premises Microsoft Hyper-V virtual servers to a VMware vSphere enterprise infrastructure.
Opening a Windows Server VHDX backup on a developer workstation running VMware Workstation.
Consolidating multi-hypervisor testing labs into a single VMware-based environment.

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.

File formats: what to choose

A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.

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Disk images

Virtual disks and raw drive images.

Common extensions: ISO, IMG, VHD, VMDK, QCOW2

Advantages

+ ISO is standard for installers and OS images
+ VM formats bundle entire systems
+ Preserves exact byte-level copies

Disadvantages

− Images are often several gigabytes
− Conversion between VM formats can be slow
− Boot sectors may break if format changes

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Images

Raster and vector graphics for web, print, and photography.

Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF

Advantages

+ WebP and AVIF offer excellent compression for the web
+ PNG keeps transparency and sharp edges
+ SVG scales without quality loss

Disadvantages

− RAW and TIFF files are large and slow to share
− JPEG loses quality on every re-save
− Some formats are not supported in older browsers

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Documents

Office files, PDFs, ebooks, and plain text.

Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT

Advantages

+ PDF locks layout for printing and sharing
+ DOCX and ODT are easy to edit collaboratively
+ Plain text works on any device

Disadvantages

− PDF is hard to edit without special tools
− Complex layouts may shift after conversion
− Scanned PDFs need OCR for editable text

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Video

Clips, streams, screen recordings, and movies.

Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG

Advantages

+ MP4 (H.264/H.265) plays almost everywhere
+ WebM is efficient for web embedding
+ MKV can hold multiple audio and subtitle tracks

Disadvantages

− High-resolution video needs lots of storage and bandwidth
− Re-encoding always takes time and may reduce quality
− Some codecs require licensing for commercial use

Frequently asked questions

Yes, but you may need to install VMware Tools or adjust storage controllers (like switching from IDE/SCSI to LSI Logic/Paravirtual) inside the virtual machine for optimal performance.

The size changes only insignificantly because both formats store the exact same raw sector data, differing only in how headers and metadata are organized.

Yes, dynamically expanding VHDX images are fully supported, though the resulting VMDK can be configured as either thick or thin provisioned depending on your destination needs.

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