Deki is a versatile browser add-on designed to enhance learning through customizable flashcards and quizzes. It enables users to create rich flashcards featuring text and images, and allows for user-defined review intervals without the constraints of forced spaced-repetition algorithms. The tool is particularly beneficial for those who prefer to manage their study schedules independently, providing features like a review queue and the ability to track quiz history for focused revision. Deki emphasizes offline functionality, ensuring that all data remains stored locally for quick access.

In addition to its core features, Deki offers unique capabilities such as saving terms directly from webpages and crafting reusable AI prompts for various services. Users can customize card layouts and easily manage their term sets with search and filter options. Designed with privacy in mind, Deki ensures that no data is transmitted externally unless the user opts for cloud synchronization, making it a secure choice for learners.