Instagram's privacy settings are server-side. Private account content is only accessible to approved followers. No third-party tool can bypass this — if one claims it can, it's lying.
Any website, app, or tool claiming to let you view private Instagram profiles without following the account is almost certainly: free instagram private photo viewer
If you are looking for anonymous viewing of accounts (to avoid appearing in "Seen" lists), these tools are more reliable: Instagram's privacy settings are server-side
Your browser is now part of a spam network. it's lying. Any website
Most legitimate security experts and tech platforms, such as , state that there are no functional workarounds