Invert a PNG's Alpha Channel
Flip the transparency of a PNG: areas that were opaque become transparent, and transparent areas become opaque. The colours stay exactly as they were — only the alpha values are inverted. Runs in your browser; nothing uploads.
Drop PNG files here
Multiple files allowed
What inverting alpha does
Each pixel's transparency is replaced with its opposite — a value of 255 (opaque) becomes 0 (transparent) and vice-versa, with partial values mirrored around the middle. It effectively turns a cutout into its "hole": the subject disappears and its former background becomes solid. Useful for making stencils, inverted masks, and knockout effects.
FAQ
What happens to the colours?
Nothing — only the alpha channel changes. If you also want to invert the colours (a negative), use Invert colors.
My whole image just vanished — why?
If the image was fully opaque, inverting alpha makes it fully transparent (invisible). Inverting alpha only produces a visible result on images that already have some transparency.
Can I get the original back?
Yes — running invert alpha again restores it, since inverting twice returns the original values.