Seed Phrase Generator Free Though it employs BIP32 process you could however import BIP39 seeds into Electrum wallet. Also aside from BIp32 There's BIP44 Variation which some wallet use for that generation of seeds. You could see the entire supply code in standalone, offline html file. Alternatively you can Test https://socialrus.com/story18628720/bip39-rust-crate-about-bip39