Bip39 implementation https://www.tumblr.com/generalllamacolor/787594721599078400/can-you-depend-on-online-bip39-generators-a Though it utilizes BIP32 system you may continue to import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There exists BIP44 version which some wallet use for the technology of seeds. BIP39 improves wallet protection by earning backups trustworthy, ... https://getidealist.com/story22333652/bip39-passphrase-github-5-tips-about-bip39-checksum-you-can-use-today-https-linktr-ee-bip39