No working tool exists because Facebook’s architecture prevents it. Anyone claiming otherwise is either scamming you or distributing malware. The only legitimate way to see a full locked profile picture is to be friends with that person.
The most direct way. Once accepted, you can see all photos. fb locked profile dp viewer full
While you cannot bypass Facebook’s core privacy infrastructure, a few legitimate workarounds exist depending on the user's specific privacy settings. 1. The Mobile Browser Trick (mbasic) fb locked profile dp viewer full