Bip39 js https://www.plurk.com/p/3hf2syltjx Although it uses BIP32 process you'll be able to continue to import BIP39 seeds into Electrum wallet. Also besides BIp32 You can find BIP44 Model which some wallet use to the era of seeds. Press X to abort passphrase application and preserve modifying the passphrase. Picking out https://bookmarkcork.com/story21308813/bip39-generator-with-balance-bip39-compatible-wallet-an-overview-https-cutt-ly-uryc5rw7