CourseAI.io is a smart 2026 quiz-first self-learning platform that turns YouTube videos, PDFs, documents, or notes into interactive quizzes and study aids using advanced AI. Supports 8 quiz formats (multiple choice, true/false, fill-in, matching, etc.), spaced repetition, progress tracking, and export options. Free forever with no card needed—ideal for students, serious learners, teachers creating practice sets, or anyone turning content into active recall tools. Fast generation, clean UI, privacy-focused—no ads, no data selling.