Bip39 library https://list.ly/i/11078004 Although it uses BIP32 system you may continue to import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 Variation which some wallet use for your technology of seeds. Exactly how much safety does a passphrase insert? A BIP39 passphrase appreciably boosts your Bitcoin wallet’s https://socialbuzzfeed.com/story5651258/bip39-derivation-path-5-simple-statements-about-bip39-converter-explained-https-t-me-bip39-chat