Bip39 Npm. First and foremost you should retail store it SEPARATELY from your seed. Owning your seed and your passphrase in the identical location defeats the purpose of getting a passphrase in the first place. And not using a passphrase, your resources are only as safe as your seed phrase. https://bookmarkuse.com/story18624781/bip-39-https-linktr-ee-bip39-the-fact-about-bip39-wallets-that-no-one-is-suggesting