Are there any reliable web tools or services that allow users to anonymously view and download private Instagram Stories, and how do these tools protect the user's identity?
Hi, yes I can recommend you a tool that I have used many times, Privatestorydownloader (https://privatestorydownloader.com/) is one of the most reliable tools. It allows you to view and download private IG stories without logging in. No app, no registration, and it does not track your real profile or IP - completely anonymous and browser based.
I like that it does not require logging in or installing - keeping it anonymous makes it much more reliable.
I've kept things low key by only viewing stories from accounts I'm already allowed to follow, and tools that don't reveal who I am make that easier. I've used goonview.com (https://goonview.com/) to check stories in a more private way, since it doesn't ask for a login. Just remember it won't magically open stuff you don't already have access to, but it keeps your footprint small.