What Is a VHDX File?

Open, Edit, and Convert VHDX files

A file with the VHDX file extension is a Windows 8 Virtual Hard Drive file. It acts like a real, physical hard drive but is stored in a single file that's located on a physical disk like a hard drive. One can be created from scratch or from backup software like Disk2vhd.

VHDX files can contain an entire operating system for purposes such as testing software or running older or newer software not compatible with the host operating system or simply to hold files like any other storage container.

VHDX files.

VHDX files differ from VHD (Virtual PC Virtual Hard Disk) files in that they can be larger than 2 TB (up to 64 TB), can withstand power failure events, and provide performance enhancements.

How to Open a VHDX File

Windows 10, Windows 8, and Windows Server 2012 open VHDX (and VHD) files without the need to download any programs or tools. Just right-click the VHDX file and choose the Mount option.

Another way to open a VHDX file is through Disk Management through the Action > Attach VHD menu. Read more about how to open disk management if you're not sure how to get there.

If you go the second route through Disk Management, you can optionally open the VHDX file in read-only mode by checking that option before you open the file. This approach reads data off the VHDX file but it won't let you or any program write information to it—which is useful if you're concerned that the host computer is infected with malware.

Eject or close a VHDX file through Windows Explorer by right-clicking the mounted virtual hard drive and choosing Eject.

If you find that an application on your PC does try to open the VHDX file but it's the wrong application or if you would rather have another installed program open VHDX files, see our guide for changing file-type associations in Windows.

How to Convert a VHDX File

Hyper-V Manager is built-in to some versions of Windows. It converts VHDX to VHD. Install the program through the Windows Feature section of Control Panel.

StarWind V2V Converter converts VHD files to VMDK (Virtual Machine Disk) for use in the VMWare Workstation program. You can make it a growable image file or one that has a pre-set size. You can also use this program to convert the VHD file to IMG or another VHD file that's growable or has a pre-allocated size.

If you need your VHDX file to be a VDI file (VirtualBox Virtual Disk Image) to work with VirtualBox, install the VirtualBox program and then run this command:

VBoxManage.exe clonehd "location-of-the-VHDX-file.vhdx" where-to-save-the-file.vdi --format vdi

To convert VHDX to ISO isn't very helpful since an ISO file is normally stored on a CD for booting purposes, and putting the VHDX content in that format would be unnecessary. However, for storage purposes, you can convert the file to ISO by first convert the VHDX file to IMG using the method above, and then using IMG to ISO to complete the conversion.

Is Your File Still Not Opening?

Double-check the file extension if your file doesn't work with the programs mentioned above. A VHDL file looks like it says VHDX but it's really unrelated and cannot open with the VHDX openers and converters from above. VHDL files are actually plain text VHDL Source files that can open in a text editor.