Annotation Overlay

Zoom-style annotations for Google Meet: viewers draw on the presenter's shared tab over a peer-to-peer session.

Annotation Overlay brings live, shared annotation to Google Meet screen shares. When you present a Chrome tab in Google Meet, everyone in the call who has the extension can draw, highlight and point on your shared tab. Every mark appears on your actual screen, at the exact spot it was drawn, so it also shows up in the screen share for people who don't have the extension. ALWAYS ON • Start presenting a tab (Present now → A tab) and annotations turn on automatically. • An invite is posted to the Meet chat for participants who don't have the extension yet. • Participants who already have it join instantly, and the invite is hidden for them. TOOLS • Pen, highlighter, arrow, rectangle and ellipse • Laser pointer labeled with your name • Eraser, undo and clear all • 8 colors, 3 stroke sizes and keyboard shortcuts (P, H, A, R, O, L, E; Esc to stop drawing) PRECISE • Marks are positioned relative to the presenter's screen, so they land on the same spot no matter how large, or what shape, each viewer's window is. • Viewers can only draw inside the shared screen; the rest of the Meet window stays clickable. • Your own strokes appear instantly, then hand off to the live video once the presenter's screen shows them, so you never see them twice. PRIVATE • Annotations travel directly between participants' browsers over a peer-to-peer (WebRTC) connection. • No account, no sign-in, and nothing is stored on a server. Annotations disappear when the presentation ends. • A public connection broker (PeerJS) is used only to introduce participants' browsers to each other. HOW TO USE 1. Install the extension. 2. Presenter: in Google Meet, choose Present now → A tab and pick the tab to share. 3. Everyone else with the extension: pick a tool from the toolbar and draw on the shared screen. Both automatic behaviors can be turned off in the extension's popup. REQUIREMENTS • Google Chrome on desktop, with Google Meet in the browser. • The presenter must share a browser tab, not a window or the entire screen. Annotation Overlay is an independent tool and is not affiliated with or endorsed by Google.