Online web font services commonly offer five file formats to choose from: .eot, .woff, .woff2, .svg, and .ttf. The .woff and .woff2 formats have the best support when it comes to email, so we suggest using one or both of these formats when you can. The @font-face method is the only method that allows you to specifically choose what file format you’d like to import, making it the most bulletproof method for implementing web fonts.

Online web font services commonly offer five file formats to choose from: .eot, .woff, .woff2, .svg, and .ttf. The .woff and .woff2 formats have the best support when it comes to email, so we suggest using one or both of these formats when you can. The @font-face method is the only method that allows you to specifically choose what file format you’d like to import, making it the most bulletproof method for implementing web fonts.