If you are using Facebook on desktop, then follow the steps mentioned here to know your Facebook profile viewer. Open the Facebook timeline page and right-click anywhere. Now, press Ctrl+U to open page source tab. After that, press Ctrl+F on the new tab that has the HTML codes. Now, type Buddy_ID in the search area and then press enter. Then, a list of profile IDs will open up before you. These are the IDs of your Facebook profile viewers