How to make a VDI file from VHD or VHDX?

[Krischu]

I have a VHD and a VHDX file, both generated using the disk2vhd tool when I sat on the physical machine. The latter not being available anymore.

Now with one of these VHD od VHDX files, how would it be possible to build a VirtualBox VM from them?

[scottgus1]

Mpack's CloneVDI:

Reads VDI,VHD,VHDX,VMDK,Parallels HDD,RAW files and physical drives, writes VDI.