TypeFlux currently lets you swap fonts, adjust heading sizes, tune weight, line height, and letter spacing on any live site. You can also click any element to style it individually.
I built it primarily as a design debugging tool, but I'm curious how people would actually use it day to day.
TypeFlux is a Chrome extension that lets you preview and test typography on any live website, without touching DevTools or writing any CSS. Instantly swap fonts from 30 Google Fonts, adjust sizes, weights, spacing, and line height with real-time sliders. Click any element to style it independently. Perfect for designers, developers, and accessibility auditors.