Curious about the design behind about.youtube? SiteFontCheck scanned their live CSS architecture and identified 4 unique font families. The website relies heavily on <roboto, arial, sans-serif> for its main text elements, paired with <google sans, arial, helvetica, sans-serif> and <youtube display, roboto, sans-serif> as fallback options, and 1 additional. Below is the precise map of font sizes, weights, and text elements used across their site.