Yeah, I’ve been using Blinkviewer for exactly that. You just paste the username or profile link and it shows you the public feed exactly how a stranger would see it. No logging out, no private browser windows, no hassle. Works on mobile too. I use it to check how my own posts look to people who aren’t following me. Also handy for viewing public profiles without leaving a trace or having to sign in and out constantly. It’s free, simple, does what it says. Give it a shot, sounds like what you’re looking for.