Will it end at the same time on every screen?

Yes. The target time is saved in UTC, so every screen reaches zero together, in any time zone.

Can it count down a length of time instead?

Yes. A timer counts down minutes from when the page opens, like the speaker timer.

Your message, such as “Welcome!”, in place of the countdown.

Fullscreen countdown timer

Count down to doors opening, a launch or midnight on New Year’s Eve, fullscreen on any TV or projector. The time is saved in UTC, so every screen with the link reaches zero at the same moment.

Open fullscreen Customize in the editor

Free, no account needed. The link holds the whole sign.

Count down to anything

Event openings, product launches, the end of a sale, a wedding, or New Year’s Eve at midnight. Pick the date and time, open it on the TV or projector, and it counts down to the second, then shows your message.

Counting down minutes rather than to a date, such as a break or a test? Use the classroom timer or the speaker timer instead.

Put it on a TV

Make it above. The preview is exactly what the screen shows.
Open it on the screen. Press Open fullscreen on that device, or send yourself the link. For a TV with a free account, open ownscreen.com/tv and enter its code on your phone.
Leave it running. It fits any screen size and asks the screen to stay on.

Questions

Will it end at the same time on every screen?: Yes. The target time is saved in UTC, so every screen reaches zero together, in any time zone.
Can it count down a length of time instead?: Yes. A timer counts down minutes from when the page opens, like the speaker timer.
What shows at zero?: Your message, such as “Welcome!”, in place of the countdown.