The long string after the question marks ( ?stp= , _nc_cat= , etc.) contains time-limited tokens. These tokens are tied to and the privacy settings of the image owner.
Time-consuming, no guarantee, and relies on existing social connections. Method 4: Wayback Machine (For Deleted Pictures) If the user once had a public profile picture that is now deleted or changed, the Internet Archive’s Wayback Machine (web.archive.org) may have cached the Facebook profile page. fb profile picture viewer work
However, there is a nuance: The thumbnail version of a profile picture (the tiny 50x50px circle) is often cached publicly for performance reasons. This is what third-party "viewers" typically retrieve. You end up with a grainy, pixelated mess that is useless. When you view a profile picture on Facebook, the image is served via a URL that looks like this: https://scontent.fxxx1-1.fna.fbcdn.net/v/t1.6435-9/123456789_10123456789012345_1234567890123456789_n.jpg?stp=...&_nc_cat=...&ccb=1-7&_nc_sid=...&_nc_ohc=...&_nc_ht=...&oh=...&oe=... The long string after the question marks (