Recall.ai allows users to effortlessly capture content from a wide array of online sources, including YouTube videos, articles, podcasts, PDFs, Google Docs, Slides, TikToks, and personal notes. Once captured, the platform automatically processes this information using advanced AI. It generates concise or detailed summaries, even for lengthy YouTube videos up to 10 hours. The AI also categorizes and tags content, building a coherent and interconnected knowledge base without manual sorting. A self-organizing knowledge graph visualizes relationships between information, helping you discover connections. Beyond storage, Recall.ai transforms passive consumption into active learning by integrating Active Recall and Spaced Repetition. It automatically generates quiz questions from summaries and schedules optimal review intervals. You can receive weekly email reminders or review directly from the web app. Enhance browsing with the Recall.ai browser extension, which highlights keywords on web pages connected to your knowledge base, turning passive browsing into active discovery. This is processed locally for privacy. Recall.ai is accessible via desktop (Mac/PC) with Chrome/Firefox extensions, and mobile apps (iOS/Android) are in Beta. It supports multiple languages for AI summaries and quizzes. As a Progressive Web App (PWA), it offers offline access. Your data ownership is paramount; it's not used for AI training and can be exported. Paid plans offer unlimited storage.