Memorable secrets with real entropy
Password managers should hold most credentials, but router labels, disk encryption, and offline backup keys still need something typable. Passphrases bridge memorability and length without Leet-speak gymnastics.
Word list assumptions
Entropy estimates assume words are drawn independently from the generator's dictionary. Custom phrases you invent yourself are not measured here and are usually weaker than they feel.
Site compatibility
Some legacy forms reject spaces or cap length below thirty characters. If a passphrase fails validation, switch to the random password tool or insert hyphens between words where allowed.