A fully offline, air-gapped Bitcoin key and wallet calculator. It turns user-supplied entropy, seed phrases, or private keys into BIP39 seeds, xpubs, descriptors, addresses, and recovery data, and can also build watch-only multisig wallets without exposing private keys online.
A dedicated Bitcoin seed phrase generator that uses radioactive decay as an entropy source. Completely open source and designed to be simple, auditable, and built by anyone with readily available components.
