Bip39 Online. Due to the cryptographic style and design of BIP-39, a weak passphrase doesn't reduce the security of another wallets or assist expose the seed words. Sure, BIP39 passphrases are circumstance-sensitive. You should definitely enter your passphrase just as you set it up, like any uppercase or lowercase letters. https://allkindsofsocial.com/story4072896/bip-39-https-linktr-ee-bip39-the-bip39-wallet-diaries