Enter your emoji here:
To make this the icon on your page, copy this code and put it in the <head> of your webpage:
For a preview of your emoji icon look at the icon of this webpage. Idea based on this tweet from Lea Verou. Be aware this is kind of hackish; how nice it looks varies from platform to platform. Another strategy is to just simply put an emoji in the <title>. This displays correctly on every platform. Then again, that's not really a favicon.