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 QCOW2 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.
Convert QCOW2 disk images to VDI format instantly to run your KVM and QEMU virtual machines smoothly inside Oracle VirtualBox. This tool is essential for developers and system administrators migrating workloads between hypervisors.
QCOW2 (QEMU Copy On Write 2) is the native disk image format for QEMU, supporting features like compression, encryption, and snapshots. VDI (VirtualBox Disk Image) is the proprietary virtual disk format used by Oracle VM VirtualBox. When converting from QCOW2 to VDI, the internal file system structure, partition tables, and raw sector data are repacked into the VirtualBox container architecture, preparing the storage for the VirtualBox emulation layer.
The conversion from QCOW2 to VDI is completely lossless, meaning data integrity is fully preserved with zero degradation of guest OS files, and the final file size changes only insignificantly due to container header overhead.
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
