Bip39 library https://andersonsaeu988.iamarrows.com/bip39-generator-online-the-best-devices-for-secure-wallet-creation Though it works by using BIP32 system you could nevertheless import BIP39 seeds into Electrum wallet. Also aside from BIp32 There may be BIP44 Variation which some wallet use with the technology of seeds. It really is straightforward — if you don't concern yourself wi... https://ez-bookmarking.com/story20590097/bip39-validator-bip39-github-an-overview-https-dzen-ru-bip39-phrase-com