Disk images

VHD → VDI

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

At a glance

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

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

Convert Microsoft Virtual PC disk images (VHD) into VirtualBox virtual disk images (VDI) instantly. This tool is essential for migrating virtual machines between hypervisors.

VHD is the native virtual hard disk format developed for Microsoft's virtualization ecosystem, while VDI is the primary disk format utilized by Oracle VirtualBox. When you convert VHD to VDI, the internal partition table, file system structure, and sector data are structurally mapped to the VirtualBox architecture without altering the underlying raw data.

The conversion between VHD and VDI is completely lossless, meaning the original disk image data is preserved byte-for-byte with zero degradation.

Tips

Ensure the source VHD is detached from any running virtual machine before uploading.
Check that your target VirtualBox environment has enough free storage for the output VDI file.
Verify the virtual machine controller settings (IDE or SATA) match after importing the VDI into VirtualBox.

Common use cases

Migrating a legacy Microsoft Hyper-V or Virtual PC guest operating system over to Oracle VirtualBox on a local workstation.
Testing enterprise Windows server images built as VHD in a cross-platform VirtualBox laboratory 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. Because the conversion is lossless, all data, file structures, and operating system configurations inside the VHD remain completely intact inside the resulting VDI.

The file size changes only insignificantly, as the underlying sector data is simply repackaged to match the VirtualBox container specifications.

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