Transparent Background Maker

This is colour keying, the honest kind of background removal: it finds the background colour (or you pick it), removes every pixel close enough to it, and softens the edge. "Edges only" keeps the same colour inside the subject, so white stays inside a logo's letters.

It works on flat, even backgrounds. It cannot cut a person out of a room, a beach or a crowd - for that you need the AI background remover.