He stored a whole web page inside a favicon. The thread had three older, cleaner ways to do it (timwehrle.de)
The method: encode bytes into RGB channels with a 4-byte length header. A 208-byte page fit in 71 pixels, inside a 9x9 image, using 87% of capacity.
The reveal that one-ups it: PNG already has tEXt comment chunks built for stuffing arbitrary text into a normal-looking image.
Sign in to save