Just Do It is a widely recognized slogan of shoe company Nike. The slogan was created in 1988 at an agency meeting of Wieden+Kennedy.
The font used for the slogan text is Futura Condensed Extra Black by Paul Renner. Futura is a commercial typeface and you can view more details about it here.
Download Futura Font
The Futura font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.