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Online Whiteboard

Sketch ideas on a responsive private canvas and download a clean PNG.

Privacy: your files never leave your device. All processing happens locally in your browser.

How to use

  1. 1.Choose a pen color and brush size for the next stroke.
  2. 2.Draw on the white canvas with a pointer, touch input, or stylus; use Undo or Clear when needed.
  3. 3.Select Download PNG before leaving the page to keep a 1000 by 600 copy.

About Online Whiteboard

Online Whiteboard is a lightweight drawing surface for quick diagrams, handwritten notes, visual explanations, meeting sketches, and classroom examples. Pick a pen color and brush size, then draw with a mouse, trackpad, stylus, or touch screen. The canvas keeps the same 1000 by 600 pixel working resolution while scaling to the available page width, so pointer positions remain aligned on desktop and mobile layouts.

Each completed pen movement is stored as one stroke. Undo removes the most recent stroke without clearing earlier work, while Clear resets the entire board. The current drawing can be downloaded as a 1000 by 600 PNG with a white background, making it easy to attach to a message, place in a document, or keep as a simple record. Single taps create visible dots as expected rather than disappearing.

Everything stays in the current browser tab. The canvas is not uploaded, synced, or saved to an account. That privacy is useful for temporary brainstorming, but it also means there is no cloud recovery, collaboration history, or automatic draft after a refresh. Download the PNG before navigating away or closing the page. For long-lived projects, multi-person editing, vector objects, or structured diagrams, use a dedicated design or collaboration application instead.

For a reliable workflow, choose the brush before drawing, sketch broad shapes first, add labels with a stylus or careful pointer movement, and use Undo when only the latest mark needs correction. Download a checkpoint before making major changes. The tool is deliberately focused on freehand marks: it does not add accounts, remote cursors, embedded files, or background uploads, keeping startup fast and the interaction predictable.

Methodology & sources

Pointer coordinates are clamped and scaled from the responsive CSS rectangle to a fixed 1000 by 600 canvas. Completed strokes retain their color, normalized 1 to 40 pixel width, and point sequence; redraw and undo replay that stroke history onto a white background.

Frequently asked questions

Is my whiteboard uploaded or saved online?
No. The drawing stays in the current browser tab and disappears after a refresh unless you download it.
Can I undo a drawing stroke?
Yes. Undo removes the latest completed stroke, while Clear removes every stroke.
What size is the downloaded image?
The PNG is 1000 by 600 pixels with a white background.

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