Bip39 Mnemonic Code Converter Tool. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of protection to your wallet that actually works along with your seed phrase to encrypt and protect your wallet. https://sitesrow.com/story9224519/bip39-passphrase-https-linktr-ee-bip39-top-guidelines-of-bip39-words