When a user locks their profile, only their friends can see their photos, posts, and full-sized profile pictures . There is no "backdoor" to bypass these settings. How to Actually View Content
Most sites promising a "free link" to view private profiles are designed to exploit your curiosity. Here is what usually happens when you click them: facebook private profile viewer free link
Sometimes you can see tagged photos or comments made by a private user on a mutual friend’s public post. When a user locks their profile, only their