Bip39 Seed Generator. Firstly you'll want to keep it Independently from your seed. Obtaining your seed plus your passphrase in precisely the same location defeats the goal of having a passphrase to begin with. What constitutes a "very good wallet" is one which has clear, simple to obtain documentation on https://nanobookmarking.com/story18697920/bip39-mnemonic-https-linktr-ee-bip39-the-fact-about-bip-39-that-no-one-is-suggesting