Logging Out of Roblox Isn't as Straightforward as It Should Be
Roblox doesn't have a traditional logout button. That's the first thing you need to understand. I spent weeks wondering why I kept getting logged back into my kid's account on our shared PC until I figured out the actual workflow. The platform is designed for persistence, not for people who share devices or just want a clean break. There are two contexts here: logging out within the Roblox app or website, and ending a session across all devices. These are completely different operations and confusing them has caused more issues than anything else I've seen on the forums.
How To Log Out Of Roblox Properly
The most common scenario is someone just wants to leave their account open while they're using the computer and have someone else take over. This usually comes up with parents who share a family PC, or older siblings whose younger kids want to play on the same machine. Here's how you actually do it without leaving your account wide open. On the browser version at Roblox.com, click the gear icon in the upper right corner for settings. From there, head to the Security tab and look for the active sessions section. You'll see every device currently logged into your account. Click the X next to any session to end it. This is the clean way to do it, and honestly it's the only way that actually works across all devices simultaneously. If you're on the Roblox desktop application, it's slightly different. Close the app entirely first, then go to Roblox.com in your browser and follow the steps above. The app caches your credentials aggressively, so just closing the window won't log you out. I learned this the hard way when my nephew somehow got back into my account three days later because I thought closing the app was enough. It isn't.
Mobile works similarly but the UI is more cramped. Open the app, tap the More button, then Settings, then Account Info. Scroll down to the security section and manage active sessions from there. The mobile app doesn't have a dedicated logout button either, which is infuriating if you ask me, but the session management approach does the same thing.
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What Happens When You Clear Cookies
This is where people get tripped up. Clearing your browser cookies will effectively log you out of the web version, but it won't touch the desktop app or mobile app at all. These apps maintain their own login state separate from the browser. I've seen people clear their cookies thinking they were done, then wonder why their kids were still playing on Roblox on the family computer. If you're trying to log out on a shared computer and only clear the browser cookies, the Roblox desktop app will stay logged in. Check both. I recommend doing a site-wide session kill through the security tab rather than relying on cookie clearing, which is unreliable anyway depending on your browser and privacy settings.
The Parental Control Angle
Some people come to this question because they're trying to manage their child's Roblox access and think logging out will solve whatever issue they're dealing with. It won't, if the child has the app installed. The desktop and mobile apps remember your login indefinitely unless you actively end the session or change your password. Changing your password is actually the nuclear option here. It invalidates all active sessions immediately. I know a lot of parents who use this as a temporary timeout mechanism when they need to take away Roblox access quickly. It's heavy-handed but effective, and it works across every platform at once. There's also the PIN feature under settings if you want to prevent accidental logins or young kids from getting back in. Set a four-digit PIN and even if someone is sitting at your computer, they can't access the account without it. This isn't logging out but it serves a similar purpose for families dealing with screen time disputes.
Common Problems and What Actually Works
The biggest issue I see is people trying to log out and then wondering why their account is still active. Usually it's because they only did half the job. They closed the browser tab but didn't end the session, or they logged out of the website but the app stayed signed in. Always verify by checking the active sessions list after you think you're done. Another problem is the Remember Me checkbox on the login screen. If you've checked this on a shared device, you're essentially permanent logged in until you manually remove the session. Uncheck it going forward if you share a computer regularly. And one more thing that catches people off guard: logging out doesn't delete your game progress, items, or friends. Everything stays intact on the server side. If someone is worried about losing data by logging out, they don't need to be. The only thing you lose is the active credential on that specific device.

If you're dealing with a situation where someone keeps getting logged back in despite your efforts, the only reliable fix is a password change combined with session termination. Everything else is a band-aid at best.