Facebook doesn't let people track who views their profile. Third-party apps also can't provide this functionality. How do I edit my Facebook profile picture thumbnail?

Facebook doesn't let people track who views their profile. Third-party apps also can't provide this functionality.

If a profile is locked, non-friends can only see a small, low-resolution thumbnail of the profile picture. 👁️ What Can Be Seen?

The tool was simple to use: users just had to enter a Facebook user's ID, and the tool would fetch and display their profile picture. Rahul hosted the tool on a small server and shared the link with his friends.