Ghostmark

Share your screen with your name and today's date tiled across it, so a leaked frame points home.

Ghostmark renders a live watermark tiled across every connected display, sitting on the desktop behind your app windows. Customize the text and icon, rotation, layout mode, spacing, colors, stroke, and shadow, and drop in `{date}`, `{time}`, `{datetime}`, `{user}`, or `{host}` tokens that stay current on their own. Three window levels let you choose whether it hides behind windows, floats above them, or sits in between. Multi-monitor aware: displays are tracked by hardware ID, so rearranging screens rebuilds the tiling correctly.

Features

• Live watermark tiled across every connected display
• Text + icon, rotation, layout modes, spacing, and stroke
• `{date}` / `{time}` / `{datetime}` / `{user}` / `{host}` tokens
• Three window levels: behind, above, or between windows
• Multi-monitor aware, rebuilds on display reconfiguration

Details

• **Price:** Free · Open source
• **Requires:** macOS 26+ on Apple silicon (packaged .dmg, 2.6 MB)
• **Built with:** Swift and AppKit
• **Privacy:** no analytics; your data stays on your Mac

Ghostmark is part of [NoSleepLab](https://nosleeplab.com), one developer's collection of Mac, iPhone and web apps.