You highlight — Lumen writes the cards.
Box-select any region of a lecture PDF and get atomic Anki cards in seconds.
Draw a box around any passage, diagram caption, or table row. Lumen reads the context and generates atomic, exam-ready Anki cards — front, back, cloze variants, all in one shot.
Select any region of an anatomical diagram, pathway, or chart and Lumen drops a gold mask over it. During review, masks lift one at a time — the same way you'd cover a textbook with your hand. Students say this single feature saves hours every block.
Too broad? Atomize a dense card into 2–3 focused ones with a single click. Wrong angle? Redo it. Not useful? Discard it. Every card Lumen generates is a suggestion — you approve what goes into your deck.
Split a 200-page mega-PDF into week-sized chunks, or stitch three separate handouts into one clean file before importing. No AI tokens, no account required — just free file surgery.
Pick the palette that keeps your eyes happy. Operating Theater, Paper, Chill, Focus, and more — each designed for real studying, not marketing screenshots.
Open a lecture PDF and highlight something.
Lumen handles the rest.