Curious about the design behind regex101.com? SiteFontCheck scanned their live CSS architecture and identified 2 unique font families. The website relies heavily on <montserrat, -apple-system, blinkmacsystemfont, segoe ui, roboto, helvetica neue, sans-serif> for its main text elements, paired with <ibm plex mono, source code pro, monospace> as fallback options. Below is the precise map of font sizes, weights, and text elements used across their site.