Bip39 app https://edgargvkh682.theburnward.com/a-novice-s-overview-to-getting-a-bip39-mnemonic-expression Though it uses BIP32 approach you can even now import BIP39 seeds into Electrum wallet. Also besides BIp32 There may be BIP44 version which some wallet use for that generation of seeds. Contrary to standard wallets derived solely from a seed phrase, passphrase-safeguarded wallets ... https://onelifesocial.com/story5596469/bip39-solver-gpu-the-5-second-trick-for-bip39-compatible-wallet-https-dzen-ru-bip39-phrase-com