Minilith’s blog is its own demo: the page is a bare loader that fetches one PNG, draws it to a canvas, and pulls the post out of the low bits of each pixel’s color channels — three bits red, three green, two blue, decompressed back into a page. Before running any of it, the loader verifies an embedded signature and separately hashes the untouched high bits, so a tampered picture, or a tampered post, refuses to load. A companion editor at minilith.site generates your own signed PNG in-browser.