Fullscreen Timer
A fullscreen timer counts down from a set length to zero on a big, readable display. This page opens a countdown built for rooms full of people — classrooms, meetings, workouts, and events — with quick presets and warning colors so everyone can see how much time is left at a glance. Set a duration, press start, and switch to full screen.
A shared countdown the whole room can see
When a timer is small and private, only one person really knows how much time is left. A fullscreen countdown fixes that: the remaining time is shown in large numbers that everyone reads at once, so a class, a meeting, or a workout stays in sync without anyone calling out the time.
As the countdown nears the end, the display shifts through warning and final colors. That gives a calm, visual cue to wrap up rather than a sudden alarm, which is exactly what you want when you are guiding a room through an activity.
Presets and durations for any activity
Quick presets make it fast to start a common length — a few minutes for a classroom transition, a longer block for a work session or exam, and everything in between. You can also set an exact duration when you need one, and adjust the warning and danger thresholds so the color cues land where you want them.
The same timer suits a surprising range of uses: cleanup and transitions in a classroom, timeboxed agenda items in a meeting, rounds and rests in a workout, and holds before an event begins.
Running it on a big screen
Press start and switch to full screen so the countdown is the only thing on the display. Put it on a projector, classroom screen, or meeting-room monitor where the room can see it, and on supported browsers the page keeps the screen awake so the timer stays visible to the end.
If you need to measure how long something takes rather than count down a fixed length, use the stopwatch instead; the timer is for when you know the duration in advance and want everyone to see it run out.
Frequently asked questions
Can I set a custom duration?
Yes. Use a quick preset for common lengths or set an exact duration in the settings, then launch the countdown full screen.
What do the colors mean?
As the countdown approaches zero it shifts through a warning color and then a final color, giving a visual cue that time is almost up. You can adjust the thresholds in the settings.
Does the timer make a sound when it ends?
The countdown signals visually as it reaches zero with color changes, which suits shared displays where a large, clear picture matters more than audio.
Can the whole room read it?
Yes. In full screen the numbers fill the display, so a countdown is legible from across a classroom, meeting room, or event space on a projector or large screen.
Is the fullscreen timer free?
Yes. It runs in the browser with no account or install, on laptops, tablets, and shared displays.