This is often the fastest solution. Use a burner account (a secondary Instagram handle with a real name and profile picture) or... simply send a follow request from your real account. If you are a parent, be honest. If you are a marketer, try a professional DM.
Tools that require a software download (often .exe or .apk files for Android) are vectors for malware.
You might find a site that shows a blurred image of the profile you want to see. It claims you must complete a "human verification" survey to unlock the view. You will be asked to enter your phone number for a "free trial" or to complete a paid survey. This results in:
Let's foster a community that values and respects privacy. Share this post with someone you care about to help them stay safe on Instagram!
Even if a tool did work, using it would be illegal in most jurisdictions. Viewing private data without authorization violates:
Attempting to view private photos is not just a breach of etiquette; it is a breach of law.