Here’s a neat trick. You can use an emoji as a favicon! I’ve written previously about how to do favicons properly, but for a short-lived hack project you tend to just need something quick and dirty. Chris Coyier has also shared a nice lil’ Codepen website showing the technique in action.
Now that all modern browsers support SVG favicons, here's how to turn any emoji into a favicon.svg:
— Lea Verou (@LeaVerou) March 22, 2020
<svg xmlns="https://t.co/TJalgdayix" viewBox="0 0 100 100">
<text y=".9em" font-size="90">💩</text>
</svg>
Useful for quick apps when you can't be bothered to design a favicon! pic.twitter.com/S2F8IQXaZU