Bip39 node js https://www.cheaperseeker.com/u/adeneuwaks Even though it works by using BIP32 system you could still import BIP39 seeds into Electrum wallet. Also other than BIp32 there is BIP44 Model which some wallet use for that technology of seeds. Due to the cryptographic layout of BIP-39, a weak passphrase won't lessen https://nowbookmarks.com/story20040765/jade-bip39-passphrase-what-does-bip39-generator-mean-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw