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 — math and the default font are built in, so it presents fully offline).

• Pick a tool (T text, R rectangle, E ellipse, L line) and drag on the slide. Works with touch too.
• Toolbar “Add Slide” offers layout templates (title, two-column, quote…).
• 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).
• Select several elements and press Ctrl+G to group them.
• Right panel: position, colors, per-element animations, per-slide transitions.
• F5 presents; swipe or arrow keys navigate. N notes, P presenter view.
• 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, ☰ opens presenter view). Large or small decks both fine — it all runs locally in your browser.