There are various tools and websites that claim to allow users to view private Instagram profiles, but it's important to log on these when caution. Many of these tools can be unreliable, may require personal information, or could violate Instagram's terms of service. Additionally, using such tools can compromise your own security or guide to scams.
The safest and most ethical habit to view a private profile is to send a follow request directly to the user. Always prioritize privacy and glorification in your online interactions.