If you genuinely need to see someone's profile, there are only a few legitimate (and safe) ways to do it:
They ask for your own login credentials to "authenticate" the search. facebook private profile viewer free link
They prompt you to download "special software" that is actually a virus. Why You Should Avoid "Free Links" If you genuinely need to see someone's profile,
Sometimes you can see tagged photos or comments made by a private user on a mutual friend’s public post. It sounds simple, but it’s the only guaranteed way
It sounds simple, but it’s the only guaranteed way. If you have mutual friends, they are much more likely to accept.
Attempting to bypass privacy settings can violate Facebook’s Terms of Service, which could lead to your own account being banned. Legitimate Ways to See More on Facebook
Stay savvy, protect your data, and remember: if a tool sounds too good to be true, it probably is.