Screen-sharing a timer inside Zoom works, but it takes over your whole screen. Open this on a second monitor or phone instead, or drop the link in the meeting chat — everyone gets their own synced countdown without you sharing anything.
Zoom has its own meeting timer (Settings → Meetings → Show meeting timer), but it's visible only to the host, and disappears from view the moment you share your screen. CountLink's link works for everyone — each attendee opens it on their own device or a second monitor, no settings change, no screen-share required.
How to use it: start the countdown here, copy the link, and paste it into the meeting chat right when the segment begins. You control it from your own tab; anyone who opens the link just watches — nobody else can accidentally pause or reset it.