What's That Web Font?
Chengyin Liu, an undergrad in Computer Science at the University of Illinois, has developed a handy web browser add-on for people who want to identify webfonts in a jiffy. The add-on, called WhatFont, is compatible with Firefox 3.6 and later; Chrome 9 and later; Safari 4 and later; Internet Explorer 9; and, to a lesser extent, Internet Explorer 8.
Installing WhatFont is as easy as dragging a bookmarklet to your Web browser's bookmark bar. Then whenever you're curious about a font on a webpage, you click the name or icon in the bar and hover over the text. WhatFont will reveal the typeface's name, size, and color; its font family; what back-up font choices the web designers specified; and show you alphabetical upper-and lowercase examples of the font. If the font you've found is a Google font or from Typekit, WhatFont will also identify the relevant webfont service. There's even a Twitter button you can click if you want to tweet your discovery.