WOFF, WOFF2 and EOT are web-only font formats for use exclusively on websites through the CSS rule @font-face. They cannot be installed on desktop computers, nor used in programs like InDesign, Quark, Photoshop or Microsoft Word.
Although WOFF, and eventually WOFF2, have emerged as the predominant webfont format, not all browsers use the same font format. Learn more about browser support for these three formats.