Glibzter Immersive - English Vocabulary Builder is a free web browser extension designed to expand users' English vocabulary while consuming online content. It curates relevant words and phrases in real-time from English subtitles of videos on platforms like YouTube and Netflix, as well as from online news articles. The extension also includes a manual entry feature, allowing users to record words from other sources, making it versatile for various learning contexts.

The program categorizes vocabulary into BASIC, ESSENTIAL, and UNCATEGORIZED groups, enhancing the learning experience. With features like a word and phrase estimator, a user-friendly dashboard, and contextual usage practice, Glibzter Immersive aims to improve spoken English skills. The web application also offers AI-generated contextual usage, audio pronunciation aids, and translation into multiple Indian languages, catering to a diverse user base interested in enhancing their communication skills.