Skip to main content

whiteboard

An online whiteboard provides a digital canvas for sketching, brainstorming, diagramming, and drawing — without installing software or signing up. Useful for quick sketches during calls, teaching demos, system-design interviews, brainstorming alone, and anywhere a sheet of paper would do but you need shareable output. The ZTools Whiteboard runs entirely in the browser, supports pen / shapes / text / eraser / undo / redo / multi-color / pressure-sensitive input on supported devices, and exports as PNG (raster) or SVG (vector).

Use cases​

Quick sketch during a video call​

Share screen, sketch a flow / diagram while explaining. Faster than slide creation.

System design interview practice​

Sketch architecture diagrams; export as PNG to review or share.

Brainstorming alone​

Map ideas spatially. Export final state as image to keep.

Teaching demos​

Live drawing during an explanation. Watch students follow.

How it works​

  1. Pick tool — Pen (free draw), line, rectangle, circle, arrow, text, eraser, select.
  2. Configure — Color (palette + custom), stroke width, opacity, fill (for shapes).
  3. Draw — Mouse, touch, or stylus. Pressure sensitivity supported on devices that report it.
  4. Save / share — Export PNG / SVG. Keyboard shortcuts: Ctrl+Z undo, Ctrl+S save, Ctrl+0 reset zoom.

Examples​

Input: Quick architecture diagram

Output: Boxes for services, arrows for connections. Export PNG to paste into a doc.

Input: Annotated screenshot

Output: Paste a screenshot, draw circles / arrows / labels on top. Export annotated version.

Input: Lecture sketch

Output: Math diagrams, free-hand annotations. Export to share with students.

Frequently asked questions​

Real-time collaboration?

This tool is single-user — for collaboration use Excalidraw, Miro, FigJam, etc. The advantage here: no signup, no upload, fully private.

Save works in progress?

localStorage persists work between sessions on the same browser. For permanent storage, export PNG / SVG.

Touch / stylus support?

Touch + Pointer Events API. iPad with Apple Pencil + recent Surface devices have pressure sensitivity.

Privacy?

All in browser. Drawings never uploaded.

Tips​

  • For system design diagrams, use rectangles + arrows — keep sketches loose, focus on structure.
  • Export SVG when scaling to print or large screens; PNG for quick sharing.
  • For collaborative whiteboarding, use Excalidraw or Miro — this tool is for solo / private work.
  • Use keyboard shortcuts (V select, P pen, R rectangle, T text) — faster than mouse.

Try it now​

The full whiteboard runs in your browser at https://ztools.zaions.com/whiteboard — no signup, no upload, no data leaves your device.

Open the tool ↗

Last updated: 2026-05-06 · Author: Ahsan Mahmood · Edit this page on GitHub