Yes there is an online website app that you can use to find your face shape.
Your face can be oval, oblong, heart, and triangle. This app can tell you the shape of your face.
All you need to do is upload photo and let it decide the shape of your face.
Visit: Find your face shape
This website also helps you to know your jaw type, length/width ratio, and of course face shape.
It is advised that a front facing picture with hair pulled back is a good option to upload photo.
JUst know that the pictures will be used to improve their algorithm.
Anyways, if you are really curious then go ahead and use this tool to find your face shape for free.