Claude Secure Logout and Browser Isolation Guide: Leave No Cache on Shared Computers

When you log into Claude on a company computer, at an internet café, or on a temporarily borrowed device, the biggest worry is that you might close the page but still remain logged in—and your chat history could still be accessible. The following Claude usage guide is organized in the order of “log out first, then clean up, then isolate.” Follow it and you can basically minimize the risk.

Log out of Claude properly: Don’t just close the tab

When using the Claude web version, first click the avatar/menu in the top-right corner of the page, find “Sign out/退出登录,” and execute it. Simply closing the browser or a tab may still retain session cookies, allowing the next user who opens the same browser to continue accessing Claude. After signing out, it’s recommended to refresh claude.ai once to confirm you’ve returned to the login page.

Clear browser leftovers: Focus on cookies and site data

If you can’t be sure you’ve fully logged out of Claude, the safest approach is to clear the site data. Go to your browser’s “Privacy/History” settings and delete the cookies, cache, and local storage related to claude.ai, then reopen the page to check whether you’re prompted to log in again. Clearing only the cache without clearing cookies is often not enough—Claude’s login state is typically maintained via cookies.

Use browser “isolation” for login: Put Claude in a separate space

If you often need to switch between different accounts on the same computer, it’s recommended to use your browser’s “Profile” feature or an incognito/private window. After an incognito window is closed, most login traces are automatically cleared, making it suitable for temporary Claude use; Profiles are better for long-term separation of work and personal accounts, preventing account mix-ups and reducing the chance of sending content to the wrong place.

An extra step for third-party login: Revoke authorization from the account side

If you log into Claude using Google and worry that a public computer may still retain authorization, you can go to your Google Account’s “Security/Third-party access” to check and remove Claude’s access permission. The next time you enter Claude, you’ll be required to re-authorize and log in, which effectively “cuts off” the old login state at the source. After doing this, don’t forget to sign out of the Google account itself to avoid leaving an even bigger risk.