An Experiment on Google Chrome's face detector API https://facedetect.netlify.com
Just try some images with faces or try your own face in the live camera, the app would identify the faces and draws boxes over it!
To put it available you must first enable Experimental Web Platform Features on your Chrome’s flags. Very simple to do.
Go to :
chrome://flags/#enable-experimental-web-platform-features
And enable the Experimental Web Platform features section.
After enabling it, click on Relaunch Now button and you should be able to access the FaceDetector API