Note: This will only work on Chrome if it is hosted from a web server due to security restrictions.
To use the program simply browse for a VXL file and open it. Your web browser will freeze for several seconds while the image is rendered and then the image will be displayed.
Maps can easily reach 500,000+ surface voxels, so it looks like real time rendering is out of the picture for now. Currently everything is 2d and it doesn't use WebGL at all.