Bip39 validator https://www.4shared.com/s/fAf7kF4dLku Even though it works by using BIP32 system you could continue to import BIP39 seeds into Electrum wallet. Also aside from BIp32 There exists BIP44 Model which some wallet use to the technology of seeds. Push X to abort passphrase application and retain editing the passphrase. Picking https://bookmarkize.com/story20514423/bip39-tool-github-indicators-on-bip39-ian-coleman-you-should-know-https-t-me-bip39-chat