The short answer
There is no universal legal yes-or-no answer for every anonymous viewing method. What you access, how the service retrieves it, what you do with a copy and the rules in your location all matter. This guide is practical information, not legal advice. Do not assume that content being visible to the public grants permission to collect, republish or use it commercially.
Public and restricted content are different
A public Story may be visible without follower approval, but private accounts restrict their Stories to approved followers. Close Friends content has a separate audience. Do not try to bypass those choices through a third-party viewer or by providing someone else's credentials. Meta explains the approval rule for private accounts. Meta: private accounts require follower approval.
Platform rules are separate from local law
A method can raise platform-terms issues even when the content is public. Meta states that unauthorized automated collection from its products violates its terms. That statement does not by itself decide the legality of every viewer or every individual visit in every country; it is a reason to review the current terms and the method a service actually uses. Meta: automated collection and platform terms.
Viewing is not a license to reuse
Saving or forwarding someone else's Story introduces a separate question from simply viewing it. Credit alone may not give you rights to repost, edit or use a photo or video in advertising. Instagram's Help Center advises posting content you created or have permission to use. Ask the creator for the original file and permission when you need to republish. Instagram Help Center: copyright and reposting.
Protect your account and other people's privacy
Enter a public Instagram username or profile link and search. Available active Stories appear below as photo or video tiles. Open a tile to view it; Instagram login is not required. A public account may have no active Stories, and private or deleted content cannot be unlocked. You do not connect your Instagram account for this search. This does not make you invisible to every service: InstaLenso processes the request. A private browser window does not hide your identity from Instagram if you sign in there. Want to return to the same public profile from your chats? Open AnonInstaBot with the Telegram button, press Start if asked, and send the Instagram username. Choose the available content there; keep the chat handy for next time. You can already view active public Stories on this website.
When to seek specific advice
If you plan bulk collection, commercial reuse, reporting on a person or use in a legal dispute, seek qualified advice for the relevant location and use case. For ordinary access questions, the safest practical route is to respect account visibility settings and ask the owner when content is restricted or a reusable copy is needed.