If a tool claims to break Facebook’s privacy, it is breaking your security instead.
Instead of looking for hacks, change your approach. Either make a genuine connection (send a request), use public cross-platform searches, or accept that the user has a right to their privacy. By respecting that digital boundary, you protect not only their rights but your own computer and identity as well.
The only exception is if a group member downloads a photo and reposts it to a public place (like Twitter or Reddit). You would have to find that external repost via search engines. The search for a "Facebook private profile photo viewer" is a modern siren song. The promise is tantalizing: a click, a download, and the secrets are revealed. But in reality, every single "viewer" is a vehicle for malware, phishing, or disappointment.
If you currently want to see a private photo, that person has explicitly chosen to hide it from you. The moment you try to use a "viewer," you stop being a curious observer and become a cyber intruder. Don't fall for the scam. Stay safe, stay legal, and stay curious the right way. Have you been scammed by a fake viewer? Immediately run an antivirus scan, change your Facebook password, enable Two-Factor Authentication (2FA), and report the scam website to Facebook at facebook.com/help.