Guides ·
How to use Countdown Timer
Countdown Timer. Set minutes or count down to a date. Yes. It tracks the end time rather than counting ticks, so it stays accurate; the alarm plays when it…
The short answer
To start a countdown timer, enter hours, minutes and seconds (or pick a preset like 5 or 25 minutes) and press Start; or count down to a date and time. An alarm sounds at zero, the remaining time shows in the tab title, and it keeps time accurately even in a background tab.
It runs in your browser. What you enter is not uploaded.
How to use it
Type or paste your input into the Countdown Timer.
Choose any options you need.
See the result update instantly.
Copy the result or download it.
Limits worth knowing
Will it work if I switch tabs? Yes. It tracks the end time rather than counting ticks, so it stays accurate; the alarm plays when it finishes.
Can I go full screen? Yes. Click Full screen for a large display, good for classrooms and presentations.