Bip39 Checksum Calculator. Although it employs BIP32 approach you'll be able to still import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There is certainly BIP44 Variation which some wallet use for the generation of seeds. This tool is meant to help end users with recovring a rather https://shanekapes.wikififfi.com/1111848/the_anatomy_of_the_bip39_phrase_entropy_terms_and_safety