PortalBox

A macOS screen sharing app that lets you share any region of your screen in Zoom, Google Meet, Teams, and more. Draw a box, get a live preview window, and share only what you want.

PortalBox helps you share exactly what you want, with a live preview window that works in every meeting app.

Share just the right region

Draw a resizable box anywhere on your screen. PortalBox mirrors only that area into a clean preview window, perfect for ultrawide screens.

• Keeps wide-screen shares readable
• Resizable handles for precise framing
• Choose any monitor or area
• Live preview window that stays crisp

Share a clean preview window

PortalBox turns your region into a dedicated preview window you can share in Zoom, Meet, Teams, and more.

• Share once, keep working
• Works with every meeting app
• Move the preview anywhere
• Crisp, focused framing

Pause when you need privacy

Pause or resume the live preview instantly from the menu bar or a shortcut. Nothing updates until you say so.

• One-click pause/resume
• Screen recording only for the preview
• Never records or uploads your screen

More to love:

• Menu bar controls: Quick access to pause, resume, and switch capture modes.
• Multi-display ready: Move the capture region across monitors with ease.
• Resizing handles: Dial in exact dimensions with snap-to handles.
• Window sizing shortcut: Use window selection as a quick sizing shortcut, then share anything inside that region.
• Shortcut support: Pause or resume capture with a global hotkey.
• Privacy by design: Only the selected region is mirrored, nothing more.