Wanting some insurance against any blade-meets-wrench or blade-meets-knuckle incidents when changing blades on my table saw, I came up with this shop-made solution. The jig is simply a narrow plywood box with a center cavity designed to shroud and snag the blade. The front nub helps lever the jig into the saw teeth, so that the blade doesn’t spin when tightening or loosening the arbor nut.
To make the blade remover, use a spare blade as a guide to sketch out the basic dimensions of the inner and outer laminations onto some 1/4" plywood scrap, then glue together a 3-ply sandwich as shown. Adjust the size of the back nub as needed to fit your saw.