To help protect users' security, Snapchat will send you a message when a change is made to your account — and if it wasn't you that made it, that's a sign that there's something wrong.

Tap the "Log Out" button. How to log out of Snapchat on your computer 1. On the Account Management homepage of Snapchat's desktop site, click on the three bars in the top-right corner of the screen.