Countdown Timer
A countdown timer that alerts you when the set time reaches zero.
Category: Date & Time
When to use?
Use it to time cooking, manage a presentation limit, or set a focus session. It alerts you when the time runs out.
How to use
- Set the time (hours/minutes/seconds).
- Press start to begin the countdown.
- Control with pause, resume, and reset.
- An alert appears when it reaches zero.
Input Explanation
Enter the hours, minutes, and seconds to set the timer.
Calculation Basis
It converts the total set time to seconds, decrements every second while updating the display, and fires an alert at zero.
Usage Examples
- Cooking timer - Use it as a cooking timer, e.g. for boiling noodles.
- Manage presentation time - Set a presentation limit to finish on time.
- Set a focus session - Set a timer to focus on one task for a fixed period.
Examples
- Set 5 minutes → counts down from 05:00 by the second
- Set 25 minutes → at zero, alerts via browser notification and on-screen display
Cautions
- The timer may pause if the browser enters sleep mode.
- It relies on the real clock for remaining time, so keep the tab reasonably active for notifications.
Guides
How to use the countdown
Enter hours, minutes, and seconds to show the remaining time to zero in real time. At completion, a notification or sound signals the timeout.
Pair with Pomodoro
Use the countdown timer for a simple timeout, and the Pomodoro timer for a focus-and-rest work rhythm.
FAQ
How does it alert when finished?
On completion it shows on screen along with a browser notification (where supported).
Can I pause it?
Yes, you can pause and then resume.
Is it accurate if I switch tabs?
Yes. It computes remaining time from the real clock, so it stays accurate across tab switches.
Can I quickly set common times?
Preset buttons like 1, 5, and 10 minutes set common times in one tap.
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