Add or make sure your web server is configured to serve these types of files for web fonts to work:
.eot: application/vnd.ms-fontobject .ttf: font/ttf .otf: font/otf .woff: application/x-font-woff
Tag: fonts
Font Squirrel
This online utility allows you to upload TTF or OTF to convert for embed with CSS3:
http://www.fontsquirrel.com/fontface/generator