Curious about the design behind blog.youtube? SiteFontCheck scanned their live CSS architecture and identified 7 unique font families. The website relies heavily on <youtubesansmonosemibold, roboto> for its main text elements, paired with <roboto, sans-serif> and <youtubesansregular, roboto> as fallback options, and 4 additional. Below is the precise map of font sizes, weights, and text elements used across their site.