When someone locks their Facebook profile (a feature available in many countries), Facebook restricts public viewing of their profile picture, cover photo, and posts to non-friends. This is a server-side privacy setting — not something a third-party tool can "bypass" without hacking Facebook itself.
These claims are designed to prey on human curiosity—whether it’s a crush, an ex-partner, a competitor, or a suspicious acquaintance. facebook locked profile picture viewer online free