Ooga boogas + giga brains have been cooking. The amount of useful stuff being added is mind blowing. First tool that gives you BIP39 words and a Bitcoin Core wallet.dat already loaded with the descriptors... from the same air-gapped session! First practical way to inspect a hardware wallet PSBT for nonce reuse without touching a key. One HTML file. Bring your own entropy. It never generates it. Hold and receive without a hardware or software wallets. Sign later. Class 5 Bitcoin laboratory

EntropyLab is an air-gapped Bitcoin calculator. One HTML file. You bring the entropy. It never rolls dice for you. You do not need a hardware wallet or a software wallet to hold or receive bitcoin. A signing device is only for spending. What it does: • Dice rolls, coin flips, hex, or binary → seed • Three dice methods: hash the rolls, BitBox-style, Ian Coleman / Keystone • Seed phrase, xprv/xpub, WIF, hex key, Casascius minikey • Optional passphrase • BIP39 seed, Bitcoin Core key, xpubs, fingerprints, descriptors • Legacy, nested SegWit, native SegWit, Taproot • Mainnet and testnet • Watch-only multisig (m-of-n from xpubs, no private keys) • Recovery sheet you can save or print • PSBT inspect: where it sends, amounts, fee, signed or not • ECDSA nonce reuse check (save `r`, compare next spend) • Optional RFC 6979 check with a key that stays in RAM for that session only Download the file. Open it on a machine that never goes online. Don’t type a real seed on a computer that’s connected. entropylab.online github.com/w-s-bitcoin/entro…