Online Countdown Timer
Set a countdown timer for any duration — type the hours, minutes and seconds, or tap a quick preset. When the countdown hits zero, an alarm sound plays. It runs entirely in your browser with nothing to download.
How to use the timer
- Enter a duration or tap a preset like 5 min or 1 hour.
- Press Start; the big display counts down.
- An alarm sounds at zero. Press Reset to run it again.
Popular uses
- Cooking, baking and steeping tea
- Workouts, intervals and rest periods
- Study sprints and exam practice
- Meetings, presentations and speeches
Why it stays accurate
The timer calibrates against your system clock on every tick rather than counting intervals, so it does not drift even when the tab is in the background.
FAQ
Will it work in a background tab?
Yes, it stays accurate. Just keep the tab open so the sound can play.
Do I need to install anything?
No. It runs in your browser, free, with no signup.