Active Dictionary

Active Dictionary is a language-learning web app for adults at B1 and above. Study texts, supported videos and PDF documents, look up words in context and save useful vocabulary for spaced repetition. An AI assistant helps explore the current material, while speaking and writing activities support practice with its language. Public materials can be explored without registration; personal features require an account. YouTube study needs available captions, PDF support depends on the document, and AI usage limits apply. Freemium with paid features.