Type a message and watch it become a 256-bit fingerprint: converted to binary, padded, sliced into blocks, expanded into a message schedule, then folded through 64 rounds of compression. You drive: advance the deck one card at a time with Next and read what each step does — or press ▶ Play to run it start to finish, slowed down, with a speed control.
Up to 96 characters — 56 or more gives you two blocks, worth seeing. Advance with next →| (or the → key): it finishes the current card’s animation, then moves on. replay ↩ reruns a card; ← steps back; space plays/pauses. The scrubber lets you drag to any step.