WOFF, the Web Open Font Format, is a font file format designed for delivering fonts to web browsers. For modern sites, WOFF and WOFF2 are usually the formats to consider. section 18.9
Think of browser font support as a small compatibility checklist:
- WOFF works in Internet Explorer 9 and later, Firefox 3.6 and later, and Chrome 6 and later. section 18.9
- WOFF2 is a newer format supported by later versions of Edge, Chrome, Firefox, Opera, Safari, iOS Safari, and Android. section 18.9
- Use only fonts whose licenses permit hosting them for the intended personal or commercial site. section 18.9
@font-face {
font-family: 'Font Name'; #1
src: url('font_filename.woff2') format('woff2'),
url('font_filename.woff') format('woff');
}
Pair WOFF2 with WOFF in @font-face so browsers can select a supported format. section 18.9

