Chalk

CHALK

From idea to sketch in seconds.

The zero-friction way to visualize your thoughts on macOS. Just open, draw, and share.

Download for Mac
Chalk library view with several diagrams
Microservices architecture flowchart in Chalk
OAuth authorization flow sequence diagram in Chalk

Focus on what matters.

No tabs to manage. No notifications to fight. Just a clean space to think out loud.

No noise.

No tabs, no panels fighting for attention. Just your board and a minimal palette of tools.

No setup.

Open the app and start drawing. No accounts, no projects to create, no first-run wizard.

No bloat.

Every pixel earns its place. Native macOS, fast to launch, light on your machine.

The perfect loop.

Designed for the "just one quick sketch" moment. The friction to go from head to screen is close to zero.

  • ✓ Instant copy-to-clipboard (PNG)
  • ✓ No "publish" or "share link" required
  • ✓ Perfect for Slack, Jira, and Docs
[Feature Mockup 2]

Mark it up. Send it on.

Paste any screenshot onto a fresh board, annotate with arrows and callouts, then copy the result straight back to your clipboard.

  • ✓ Paste any screenshot from clipboard
  • ✓ Arrows, boxes, text, and freehand
  • ✓ Copy the marked-up result as PNG
[Feature Mockup 3 — screenshot markup]

Let AI draw it.

Ask Claude or Cursor for what you need. The diagram lands in Chalk, ready to refine.

  • ✓ Flowcharts, sequence diagrams, mind maps, UML
  • ✓ Refine through chat
  • ✓ Works with Claude, Cursor, Windsurf, VS Code
Claude
Draw an OAuth flow as a sequence diagram
Typing a prompt in Claude Desktop
Claude
Draw an OAuth flow as a sequence diagram
Calling tool
chalk_create_sequence_diagram
Claude calling the chalk MCP tool
Chalk  ·  oauth-flow
User Browser Auth
The generated sequence diagram in Chalk

Simple pricing.

Start free. Upgrade when you need more.

Free

$0 forever

A scratch pad for quick sketches.

Download Free
  • ✓ All drawing tools
  • ✓ Unlimited sketches in one folder
  • ✓ Copy to clipboard as PNG
  • ✓ Auto-save, local-first

Pro

$14.99 one-time

Your organized sketch library.

Get Pro
  • ✓ Everything in Free, plus:
  • ✓ Unlimited folders
  • ✓ Tags
  • ✓ Pinned sketches
  • ✓ Library search

Ready to start sketching?

Download Chalk and bring your ideas to life.

Download Now