Bip39 npmjs https://jsbin.com/titaniseko Although it works by using BIP32 approach it is possible to even now import BIP39 seeds into Electrum wallet. Also besides BIp32 There exists BIP44 Model which some wallet use for that generation of seeds. By way of example, when you in the beginning create your wallet https://www.anobii.com/en/01000289012ff9b293/profile/activity