LearnTube AI is a Chrome add-on designed to transform passive YouTube learning into an active and engaging experience through AI-powered quizzes. This tool automatically generates contextual quiz questions based on video transcripts, enabling users to retain knowledge more effectively. The application pauses the video at natural learning points to present mid-video quizzes, followed by a comprehensive final quiz at the end. It is compatible with any YouTube video that features captions, making it a versatile tool for learners.

Key features include two AI options for quiz generation—an on-device option for privacy and a faster cloud-based option using the Gemini API. Additionally, LearnTube AI provides visual indicators on the seekbar to show quiz locations and tracks user progress with learning statistics. This add-on is particularly beneficial for students, professionals, and anyone looking to enhance their video learning retention, with research indicating a 25–45% improvement in retention through active learning.