Loona Drawing Whiteboard — Free Online Sketch Pad with Shapes & Undo
Explaining an idea, sketching a layout, solving a sum on screen, or letting students draw — a whiteboard is the fastest way to think out loud. Open the page and draw; there is nothing to install and nothing to save to a server.
How to use the Drawing Whiteboard
- Pick a tool: Pen for freehand drawing, Eraser to rub out, or Line, Rectangle and Circle for clean shapes.
- Choose a colour and brush thickness. Draw with your mouse, finger or stylus — shapes preview as you drag.
- Made a mistake? Undo steps back one stroke at a time, Redo brings it back, and Clear empties the board.
- Press Download whiteboard PNG to keep or share the finished sketch.
How it works
Every stroke and shape is stored as data — tool, colour, size and points — and the board is redrawn from that list, which is what makes precise undo and redo possible. Shapes are normalised from your drag (start corner to end corner), so you can drag in any direction. Pointer and touch events are handled together, so the same code works with a mouse in class or a finger on a phone.
Worked example
During an online lesson, a teacher sketches the water cycle live — sun, arrows, a cloud circle and labels — undoes one wobbly arrow, redraws it, and downloads the PNG to send to the class group as revision notes.
Frequently Asked Questions
Does the whiteboard work on a phone or tablet?
Yes — it uses touch-friendly pointer events, so finger and stylus drawing work alongside the mouse.
What does the eraser do?
The eraser paints in the board’s white background colour, rubbing out whatever is underneath its stroke. Undo restores anything erased by mistake.
How many steps can I undo?
Every stroke and shape is one undo step, and the whole board history is kept while the tab is open.
Is anything uploaded?
No. The board and its history live only in your browser memory.
What size is the downloaded image?
The board exports at its full 1060 × 620 pixel canvas size as a PNG.
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