Any file up to 500 MB. Drop several files and they come back as one ZIP. Many image, audio and video conversions run in your browser; anything else is uploaded and removed within the hour.
ConvertX.am converts VDI 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.
Convert Oracle VirtualBox VDI disk images to Microsoft Hyper-V VHDX format instantly. This tool is essential for migrating virtual machines from VirtualBox to Hyper-V.
VDI is the native virtual disk format used by Oracle VirtualBox, while VHDX is the modern, high-capacity standard developed by Microsoft for Hyper-V. Converting VDI to VHDX bridges the architectural gap between these two hypervisors. During the process, the underlying disk image structure is translated so that Hyper-V can natively mount and boot the virtual machine without compatibility issues.
The conversion between VDI and VHDX occurs without quality loss, as the sector data of the virtual disk is preserved entirely. The overall file size changes only insignificantly depending on the metadata overhead of the new format.
We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.
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.
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.
A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.
Virtual disks and raw drive images.
Common extensions: ISO, IMG, VHD, VMDK, QCOW2
Raster and vector graphics for web, print, and photography.
Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF
Office files, PDFs, ebooks, and plain text.
Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT
Clips, streams, screen recordings, and movies.
Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG
