LangLearn is a free browser extension designed for Chrome users to enhance vocabulary acquisition while browsing the web. This tool allows users to highlight any word or phrase they encounter, assign a learning status such as Learning, Repeating, or Known, and visually track their vocabulary development. The extension color-codes these words based on their assigned status, making it easy to revisit and reinforce learning over time.

With customizable features, LangLearn empowers users to personalize their learning experience by adjusting the statuses and colors to match their preferences. The extension operates entirely within the browser, requiring no account setup, and is compatible with all websites and a variety of languages. By converting passive reading into an engaging learning process, LangLearn streamlines vocabulary building without the need for external applications.