Bip39-Standalone. At the start you should keep it SEPARATELY from the seed. Getting your seed plus your passphrase in the identical site defeats the purpose of getting a passphrase to start with. Mnemonics are illustration of entropy. First step requires building a call as to how much entropy you think https://socialclubfm.com/story9278123/bip39-generator-https-linktr-ee-bip39-5-essential-elements-for-bip-39