Bip39 online generator https://blogfreely.net/travenmdoq/create-your-own-distinct-bip39-mnemonic-expression-with-python-scripts Even though it uses BIP32 approach you could however import BIP39 seeds into Electrum wallet. Also other than BIp32 You can find BIP44 version which some wallet use to the technology of seeds. Because of the cryptographic style of BIP-39, a weak passphrase wi... https://bookmarkpressure.com/story20026049/bip39-docs-the-single-best-strategy-to-use-for-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com