What is a VOL file?
A .VOL file is a multi-purpose data file used by several different software systems. The most frequent use is for storing 3D and 4D ultrasound volume data generated by medical equipment from companies like GE Healthcare and Kretztechnik. Other medical devices, such as the Heidelberg Engineering SPECTRALIS, use .VOL files to store ophthalmic OCT volume scans.
Beyond the medical field, the .VOL extension acts as a 3D volumetric imaging data file in scanning software like Gexcel Reconstructor and rendering tools like Mitsuba Renderer. It is also frequently used as a game data archive or 3D collision model file in video games, including the Gran Turismo series, World of Tanks, and games built on the Torque Game Engine. Furthermore, government and scientific systems use .VOL to store traffic monitoring volumes or weather radar data.
How to open VOL files?
Because the .VOL file extension has multiple meanings across unrelated industries, you cannot use a single software program to open all of them. To open a .VOL file locally, you must first identify what type of data it holds.
Medical .VOL files require specialized clinical viewing software, such as Kretz VolView for ultrasound data or Heidelberg Eye Explorer for retinal scans. Game archive .VOL files require specific community-built unpacker tools or command-line extraction scripts designed for the exact game engine that created the file.
Software and tools
If you do not know the origin of your file, guessing the correct software is difficult. viewer.online/vol analyzes .VOL files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. Once you know the exact file type, you can use specialized tools to view or manage the data.
If you need to change the file into a standard format, we recommend using convert.guru. Depending on the file's origin, you can convert medical .VOL files to .DICOM, game archives to .ZIP, or 3D volumetric data to standard .OBJ formats.
Summary
Instead of downloading unknown extraction tools or expensive clinical viewers, viewer.online/vol directly opens and previews .VOL files in the browser, eliminating the need to install software or troubleshoot compatibility issues.