In short
A fullscreen timer scales the countdown digits to fill an entire display, so it can be read from the back of a room. Press the Fullscreen button or the F key; press Esc to exit. The controls fade while it runs so the room sees numbers, not buttons.
- Enter fullscreen
- Fullscreen button, or the F key
- Exit
- Esc
- Start and pause
- Space bar — works from most presenter remotes
- Built for
- Classrooms, gyms, conferences, kitchens
Built to be read from the back row
Most timers are designed for the person holding the device. This one is designed for the person furthest from it. In fullscreen the digits scale with the screen rather than sitting at a fixed size, the controls dim to almost nothing so they do not compete with the numbers, and the tick strip gives the room a sense of progress without anyone having to read digits at all.
Where a big countdown earns its place
- Lessons and timed classroom activities
- Exams and mock papers
- Conference talks and lightning rounds
- Gyms, group classes and circuit stations
- Workshops, hackathons and quiz nights
- Kitchens, where your hands are covered in flour
Getting it onto the big screen
- Open this page on the machine driving the display.
- Set your duration, then press Fullscreen or the F key.
- Press space to start — you can do this from a presenter remote that sends a space key.
- Press Esc to come back out.
Questions about the fullscreen timer
Can I use it on a smart TV or Chromecast?
Yes, in any TV browser, and casting the tab works too. Casting adds a small delay of a second or so, so for anything competitive keep the timer on the machine everyone can see directly.
Do the controls stay on screen and distract everyone?
They fade back to almost invisible while the timer runs and return when you move the pointer, so the room sees numbers rather than buttons.
Do I need to sign up?
No. There are no accounts on this site at all, which also means there is nothing to store about you and nothing to delete later.
Does the timer keep running if I switch tabs?
Yes. The countdown is measured against your device clock rather than counted by the page, so switching tabs or opening another app does not slow it down. The alarm sounds at zero as long as the tab is still open.