The typeface on duolingo.com is KaTeX_Main, KaTeX_SansSerif and KaTeX_Size1, loaded across 60 @font-face declarations. Every font family, weight and source on this page is read straight from the live CSS — no image guessing, no machine learning, just the rules the browser used.
Get Font Info inspected the homepage of duolingo.com and parsed 2 stylesheets totalling 142.3 KB. Inside those stylesheets we found 60 @font-face declarations — the rules a browser uses to download and register a custom typeface. The primary typefaces are served from custom web font, and 34 CSS rules reference them across the page.
Check the font on a specific element
Open the live inspector and hover any text on duolingo.com to see the exact font, weight, size and line-height for that element.
duolingo.com uses KaTeX_Main, KaTeX_SansSerif and KaTeX_Size1 as its primary typefaces. These fonts are loaded from a self-hosted webfont and applied across 34 CSS rules on the homepage.
Where does duolingo.com load its fonts from?
duolingo.com loads its fonts from a self-hosted webfont. Get Font Info detected 60 @font-face declarations across 2 stylesheets on the live page.
What weights of KaTeX_Main does duolingo.com use?
duolingo.com loads KaTeX_Main in 2 weights: 400, 700. If you want to match the look, request the same weights from your font host so you only ship what's actually used.
Can I use the same font as duolingo.com on my website?
Yes — once you know the font name, you can load it from the same source. If KaTeX_Main isn't a fit (licensing, weight selection, look-and-feel), close alternatives include Inter, Manrope and DM Sans. Use the CSS snippet on this page as a starting point.
Is the font on duolingo.com free to use?
These fonts are self-hosted webfonts. They may be licensed commercially from a type foundry, custom-made for the brand, or freely available — you would need to identify the typeface and check its license at the foundry.
See fonts used by other sites
Compare the typography on duolingo.com with how other well-known sites load and use their fonts.
This page lists the fonts loaded by the homepage of duolingo.com. Get Font Info reads the live CSS — every @font-face rule, every font-family declaration — so you see the exact fonts the browser used, not an image-based guess.