CapnMark app icon

Screenshot annotation
done right.

Capture your screen, annotate with arrows, highlights, and text, then share — all in seconds.

How it works

1

Capture your screen

Press Control+Shift+S from anywhere on your Mac and drag to select any region.

2

Annotate instantly

Add arrows, text labels, numbered callouts, shapes, highlights, and blur — right in the editor.

3

Export and share

Save as a full-resolution PNG or copy to clipboard — ready to paste anywhere in seconds.

Everything you need to annotate

Instant Capture

Grab any region of your screen with a global hotkey. No fuss, no extra steps.

🎯

Precise Annotations

Draw arrows, add text labels, drop numbered callouts, and highlight exactly what matters.

🔲

Shapes & Highlights

Rectangle and ellipse overlays to focus attention on any part of your screenshot.

🫥

Blur Sensitive Info

Redact private data before sharing — blur any region with a single drag.

📤

One-Click Export

Save to disk or copy to clipboard as a full-resolution PNG, ready to paste anywhere.

🎨

Color Control

Pick any color for your annotations to match your style or team brand guidelines.