An image with a transparent background is like a painting on a window: you can see all sorts of exciting things behind it, but you can’t reach through to touch them. αlphaPun.ch changes that!
αlphaPun.ch is a JavaScript tool to create masks for transparent images. It will trace the opaque part of your PNG or GIF image, then will punch through the alpha channel (i.e. the transparent bit), so you can click on things behind it.
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