Image occlusion is a flashcard technique for diagrams: you hide labels or regions on an image and recall what sits underneath. Medical students use it for anatomy plates, language learners for labeled maps, and anyone studying charts can turn one picture into a full deck. Instead of rewriting every label as a text card, you keep the spatial layout — the bone next to its neighbor, the artery relative to the vein — which is often what exams actually test. This free online maker builds Anki-native Image Occlusion notes in your browser: no desktop add-on to install, no account required to start, and no upload of your study images to Neurako servers.
Upload a PNG, JPG, or WebP diagram. Draw rectangle, ellipse, or polygon masks over the parts you want to test, or optionally auto-detect labels with Gemini using your own BYOK API key (the image goes to your provider, never to Neurako). Group masks when several shapes should reveal together. Choose hide-all (every mask covered on the question; each card reveals one) or hide-one (a single mask per question). Preview the front and back for every card, then download a native Anki Image Occlusion .apkg for Anki 23.10+ Desktop, AnkiMobile, and AnkiDroid — or open the same cards in Neurako to review with FSRS on web and mobile.
Native export matters because Anki 23.10 shipped Image Occlusion as a first-class note type. Older workflows depended on the Image Occlusion Enhanced add-on; this tool writes the modern note format so a stock Anki install can import the deck. You still draw or AI-detect in the browser, but the file you download is the same kind of package Anki expects for IO study. If you prefer a modern FSRS app instead of Anki's scheduler, Open in Neurako hands off the occlusion cards without re-uploading the original diagram to Neurako for processing.
Neurako Tools