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00:20:00
Hrs
Mins
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Keyboard shortcuts:
Space: Start/PauseF: Fullscreen
Countdown Timer — Set a duration and stay on track
From sprints to pomodoros, hit zero exactly when you intend to.
Need scheduled alerts? Use Alarms. Tracking a session? Try the Stopwatch. Coordinating with teams? Check World Clocks.
About & how to use
Set a duration using the HH:MM:SS input or the ± controls for hours, minutes, and seconds. You can also tap the Quick Presets to populate common times instantly. Hit Start to begin the countdown. When the timer reaches 00:00:00, you'll hear a single completion beep and see a toast confirming it finished. Use Reset to return to the last duration. Adjust the Timer Size slider anytime to make the display easier to read.
Tips
- For best reliability, keep the tab open (or install the PWA) while a timer is running.
- Use Quick Presets to set frequent durations faster.
- Slide Timer Size up on mobile for large, glanceable digits.
- Make sure your device volume and Do Not Disturb settings allow the completion beep to play.