SiteFontCheck

No extension free font checker analyzer for modern web design

Check fonts on popular websites

Fonts used by

lennysnewsletter.com

Last analyzed 11/2/2026, 12:17:05 PM UTC

Curious about the design behind lennysnewsletter.com?

SiteFontCheck scanned their live CSS architecture and identified 4 unique font families.

The website relies heavily on sf compact, -apple-system, system-ui, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol for its main text elements, paired with system-ui, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol and sf pro display, -apple-system-headline, system-ui, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol as fallback options, and 1 additional.

4
unique font families
Primary font
sf compact, -apple-system, system-ui, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol

Below is the precise map of font sizes, weights, and text elements used across their site.

Detected Fonts

4 found

sf compact, -apple-system, system-ui, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol

87

Oct 13

system-ui, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol

49

Subscribe

sf pro display, -apple-system-headline, system-ui, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol

22

Lenny's Newsletter

sf pro display, -apple-system, system-ui, blinkmacsystemfont, inter, segoe ui, roboto, helvetica, arial, sans-serif, apple color emoji, segoe ui emoji, segoe ui symbol

2

Deeply researched product, growth, and career advi

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About SiteFontCheck

SiteFontCheck is a powerful no extension free font checker analyzer that analyzes any website to identify and display all fonts used in real-time. Simply enter a URL and instantly discover the typography behind your favorite websites.

About SiteFontCheck

No extension free font checker analyzer for modern web design. Detect, analyze, and explore fonts across any website with our powerful, user-friendly interface.