CX ConvertX
Disk images

IMG → VMDK

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

At a glance

ConvertX.am converts IMG 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:
IMG
Output:
VMDK
Price:
Free, no sign-up
File size:
Up to 500 MB
Your files:
Deleted automatically within about an hour

Convert raw disk images (IMG) into VMware Virtual Machine Disk (VMDK) format instantly. This tool is essential for system administrators and developers migrating physical or generic disk dumps to VMware virtualization environments.

An IMG file is a raw, sector-by-sector binary dump of a storage device, containing a complete file system and partition table without virtualization metadata. VMDK, on the other hand, is the native virtual disk format used by VMware Workstation, ESXi, and vSphere. Converting IMG to VMDK wraps the raw block data into the structure required by VMware hypervisors, enabling the image to be attached directly to a virtual machine.

Because both formats store raw sector data, the conversion is completely lossless. The file content, file systems, and data structures are preserved byte-for-byte.

Tips

Common use cases

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

No. The conversion process transfers sector data directly without compression artifacts or data removal, ensuring 100% data fidelity.
The file size changes only insignificantly, as the underlying raw block data remains identical between the two formats.
Yes, once converted, the VMDK can be uploaded to an ESXi datastore and attached to a new or existing virtual machine.

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