Everything stays in your browser. Slides are autosaved only to this tab's session storage. Nothing is uploaded, there are no accounts, no cookies, no tracking.

Once this tab closes, all data is erased. To keep your work, use Save JSON (re-open it here later) or Export HTML (a self-contained presentation file you can present anywhere, no internet needed except fonts/math).

• Pick a tool (T text, R rectangle, E ellipse, L line) and drag on the slide.
• Double-click text to edit it. Double-click math to edit the LaTeX.
• M inserts Math/LaTeX, I inserts an image (or paste a screenshot with Ctrl+V).
• Right panel: position, colors, per-element animations, per-slide transitions.
• F5 presents. Arrow keys navigate. N shows speaker notes.
• Print / PDF button exports a PDF via the browser print dialog.
• Full shortcut list: “Shortcuts” button, bottom-right.

Save JSON downloads your deck as an editable file — open it again anytime with the Open button. Export HTML downloads a standalone slideshow (works offline, double-click to present). Large or small decks both fine — it all runs locally in your browser.