Keep in mind that desktop fonts and webfonts are not the same! Desktop licensing and web licensing are completely separate, so if you’re planning on using something like FF DIN for a big project that includes print materials and a shiny new website, you’ll need to license both the desktop version (OpenType or TrueType format) and the web version (EOT and WOFF formats).
If you have only purchased a webfont, you will not be able to install the webfonts on your computer. Webfont formats — EOT and WOFF — cannot be installed on Macs or PCs. A webfont will not work in desktop programs like InDesign or Microsoft Word.
If you need a version to install on your computer for mockups or wireframes (in Photoshop or Illustrator, for example), you can use our Plugin to test out fonts in Adobe® Creative Suite® — it’s free and easy to use!