VGL filename extension is associated with VGStudio, a data visualization software.

VGL files are used for storing projects created with VGStudio. VGStudio generates VGL files based on voxel data (voxel is a term used in 3D graphics as a 3D equivalent of a pixel) in form of USG scans, tomography images or MRI images. VGStudio was developed by Volume Graphics GmbH. and is distributed under a free license.