Countdown Timer

The Countdown Timer counts down from a time you set to zero and alerts you when it finishes. It is useful for cooking, workouts, study sessions, presentations, and any task where you need a simple, visible timer.

What Is the Countdown Timer?

The Countdown Timer lets you set a duration in hours, minutes, and seconds, then counts down second by second until it reaches zero. You can pause it, resume it, and reset it. When the countdown ends, it shows that time is up and can play an alert sound, depending on your browser and sound settings. The timer runs in your browser and does not need an account.

How to Use the Countdown Timer

1. Enter the duration you want to count down, for example 25 minutes for a study session.
2. Click Start to begin the countdown.
3. Use Pause if you need to stop temporarily, then Start or Resume to continue.
4. Use Reset to return the timer to the duration you set.
5. When the timer reaches zero, stop the alert and set a new duration if needed.

Worked Example

Example: you set 10 minutes, which is 600 seconds. After 3 minutes and 30 seconds (210 seconds) have passed, the timer shows 6 minutes and 30 seconds remaining, because 600 – 210 = 390 seconds, and 390 seconds is 6 minutes and 30 seconds. After 600 seconds in total, the display reaches 00:00 and the timer ends.

Limitations

• The timer depends on your device clock and browser; a closed tab, a reloaded page, or a device restart will stop it.
• Alert sounds depend on your device volume and browser autoplay rules, so the sound may not play if audio is muted or blocked.
• The timer measures elapsed time, not exact wall-clock deadlines across time zones.
• Very long durations may be affected by the browser or device going to sleep.

Frequently Asked Questions

Does the Countdown Timer keep running if I switch tabs?

It should keep counting in most browsers, but the display may update less often while the tab is in the background. Keep the tab open for the most reliable result.

Will I hear an alarm when the timer finishes?

An alert is provided when the timer ends, but whether you hear it depends on your volume, mute setting, and browser audio permissions.

Can I pause and resume the countdown?

Yes. Use Pause to stop the countdown and Start or Resume to continue from the remaining time.

Does the timer save my setting if I reload the page?

No. Reloading the page resets the timer, so set the duration again after a reload.