Bip39 passphrase generator https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide Regardless that it takes advantage of BIP32 technique it is possible to nevertheless import BIP39 seeds into Electrum wallet. Also besides BIp32 There is certainly BIP44 Variation which some wallet use for the technology of seeds. This additional complexity increases the hazard... https://www.gamespot.com/profile/pothirpeib/