Timers
Online Countdown Timer
Set any number of minutes and seconds and count down to zero with a sound alert.
How to use the online countdown timer
- Check the preset time or enter minutes and seconds.
- Press Start (or the Space key). Pause and Reset any time.
- A sound plays when time is up; turn on ticking in Settings if you like.
Enter minutes and seconds, press Start and the timer tracks real elapsed time, so it stays accurate even if the tab sleeps.
Tips
A visible countdown helps people pace a task better than a hidden one. Keep the sound on and the tab open when you step away. For classroom use, project the timer in fullscreen so every student can see it.
Frequently asked questions
Does the timer stay accurate in a background tab?
Yes. It measures real elapsed time from timestamps instead of counting ticks, so throttled tabs stay correct.