Bip39 Mnemonic Code Converter Tool. Is passphrase similar to PIN? No, a passphrase isn't similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an extra layer of safety for your wallet that actually works along with your seed phrase to encrypt and safeguard your wallet. https://socialwebnotes.com/story4725463/bip39-generator-https-linktr-ee-bip39-not-known-facts-about-bip39