Bip39 mnemonic online https://writeablog.net/ipennywpzc/the-ultimate-overview-to-offline-bip39-generators-remain-secure Despite the fact that it takes advantage of BIP32 technique you can continue to import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There may be BIP44 Variation which some wallet use for the generation of seeds. BitBox02 - A successor towards the BitBox https://socialwebconsult.com/story5682070/bip39-vs-slip39-indicators-on-bip39-standard-you-should-know-https-linktr-ee-bip39