Instagram invests millions of dollars into its security infrastructure. If a third-party website could easily bypass privacy settings, it would represent a massive data breach. Most "viewer" sites are simply interfaces designed to generate ad revenue or steal personal information from the person attempting to do the viewing. Instagram's Security Layers
Software vulnerabilities are fixed as soon as they are discovered by security researchers. Legitimate Ways to See a Private Profile instagram private profile viewer free
It is the only 100% effective and safe method. Instagram invests millions of dollars into its security
Requests for your own Instagram password to "sync" the viewer. instagram private profile viewer free