When we produce a PNG image, we use an tag or a CSS background, and that's about it. It is dead simple and guaranteed to work. PNG is way simpler to use

<blockquote>https://www.npmjs.com/package/subfont</blockquote>

Where are we at right now in terms of the best markup for using icon fonts? Let's cover some options I think are currently the best.

Adobe Edge Web Fonts. Get started with free web fonts.