Countdown Timer
Set your own
A timer that does not drift
Most web timers add a second on every tick, and every tick lands a fraction late — over an hour those fractions add up to a visible error. This one asks the clock how much time is really left, so it finishes when it should even if the tab was in the background for most of it.
What people use it for
- Cooking, where a minute either way matters.
- Timed practice — exams, presentations, workouts.
- Meetings, to keep an agenda item inside its slot.
- Focused work, though the Pomodoro timer handles the breaks for you.
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Free to use, no sign-up, works on any phone.
Frequently Asked Questions
Yes. The remaining time is worked out from the clock rather than counted tick by tick, so a background tab that stops animating still shows the right time the moment you return.
Usually not. Mobile browsers suspend audio for a page that is not in front. Keep the tab open and the screen on for anything you must not miss, or use your phone's own alarm.
Because they add one second per tick, and every tick arrives a little late. Those small delays accumulate. This one reads the actual clock each frame, so an hour-long countdown ends when it should.
Yes, up to 99 hours. The display adds the hours field automatically once you go past sixty minutes.
No. It runs entirely in your browser, nothing is stored, and you can run it as often as you like.