Trick to find facebook Profile ID

So this is the trick which will let you get profile id of any person who got custom username. Check below image and see how URL of  facebook profile looks before and after custom username.

In case of Profile ID before custom username you can easily identify it by looking at Profile URL, But in case of profile with custom username its not same. Below are simple steps to find Profile ID having custom username.

Go to the profile you want to find Profile ID

That URL will look like this www.facebook.com/username

Change that URL to graph.facebook.com/username

Then you will get something like below image.