Copy and paste the Facebook profile URL here:

Change your URL to make it something like this:

To get the URL:

Login to your Facebook account first, then visit the profile of the person you want to get the Facebook ID. Look at the address bar of your browser, copy the link as you see in the example image and paste it into the form above. Make sure to remove everything after the first interrogation point (?) if any.

More examples:

If that's a page, then the URL should be like this:

Find Facebook ID number