Memo Whiteboard

Why Memo Whiteboard

As we move into the vibe coding era, code is becoming automated, but UI, characters, assets, and other things designed by designers still need to be drawn by people and attached as photos so that AI can develop services that better match their intent. Therefore, it is important to design quickly on a drawing board that requires no login and no install, then capture or save it and attach it to AI to develop the service you want.

The same goes for 3D game characters. AI can create them quickly, but to make them as the developer intended, it is too difficult to perfectly describe the character the developer has in mind with a prompt, so designing quickly and intuitively and attaching that is much more efficient.

Memo Whiteboard is that board: open a tab, sketch in 2D or 3D, download a PNG, and keep building. No account. No installer.

Articles — step-by-step guides

These guides are the main reading content on this site. Each one focuses on a single workflow inside Memo Whiteboard so you can learn by doing, not by rereading the same product pitch.

• How to sketch a UI for AI coding agents

  Draw screens, mark hierarchy, export, and prompt with the image.

• QuickShape explained with examples

  Snap rough strokes into clean frames for readable wireframes.

• 2D vs 3D whiteboard: when to use which

  Pick the mode that matches UI work versus spatial block-outs.

• How to attach a sketch to AI tools

  PNG export, prompt templates, and a visual revision loop.

• Block out a 3D character for better prompts

  Communicate silhouette and proportions when text is too vague.

• Wireframe mistakes that confuse AI coding agents

  Fix hierarchy, labeling, and export habits that waste prompt rounds.

• Select, move, and copy strokes in 2D

  Edge select, marquee multi-select, and clipboard shortcuts.

• PNG export checklist before you attach

  What to check so the model sees a clear visual brief.

Prefer a full list with short summaries? Open the articles hub. For raw controls, see the user guide.

What can you do in the app?

• 2D whiteboard — Freehand draw; hold to snap with QuickShape; select edges or marquee-select; copy/paste/delete.
• 3D whiteboard — Place palette shapes; move, rotate, scale; orbit and fly the camera.
• Save as image — Download PNG for sharing or AI attachment.

Open the whiteboard when you are ready to draw. Details: guide · FAQ.

A five-step workflow

1. Open Memo Whiteboard — no account.
2. Sketch in 2D (UI) or block out in 3D (characters/space).
3. Download a PNG (cleaner than a full-desktop screenshot).
4. Attach the image to your AI tool with a short constraint list.
5. If the result is wrong, sketch a correction and attach again.

Great for

Quick notes, meeting wireframes, disposable UI drafts, and visual briefs for AI coding or art tools — without opening a heavy design suite or creating a cloud project.

Privacy note

Boards stay in your browser session unless you download them. Ads may appear on content pages (not on the drawing app). See the privacy policy and terms.

Getting started

1. Read one article that matches your task, or skip ahead.
2. Click Open whiteboard and choose 2D or 3D.
3. Draw, download a PNG, and attach it where you build.

More about the product: About.

Contact

Feedback or bugs: issaclee6320@gmail.com (include browser and 2D/3D mode).