The tool is pretty awesome but the whole presentation is worth watching for anyone doing WebGL dev.

I have to say, being able to see what each drawcall is doing individually and see what each pixel goes through made me drool. I'm going to use this everyday now.

An awesomely powerful tool for any developer working with WebGL. I linked the submission to the video of the tool in-action because it is much easier to get a sense of what it does (visually stepping through scene construction frame-by-frame, pixel-by-pixel or GL call-by-GL-call).

The project page is here: http://benvanik.github.com/WebGL-Inspector/

and can be downloaded here: http://github.com/benvanik/WebGL-Inspector/zipball/master