Online Timer - Countdown with Alarm

Online Timer

Countdown timer with audible alarm

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Online Countdown Timer

The online timer lets you set a custom time and start a countdown with an audible alarm at the end. It is the ideal tool for controlling time during activities such as exercises, cooking, studying, meetings and much more.

To use, simply set the desired hours, minutes and seconds in the fields above, or select one of the quick presets. Click "Start" to begin the countdown. You can pause and resume at any time.

Automatic Sound Alarm

When the timer reaches zero, a sound alarm will be triggered automatically by the browser using the Web Audio API. The alarm works even if you are on another tab. The progress bar visually shows how much time remains.

For popular specific times, visit our dedicated pages: 5 minute timer, 10 minute timer, 15 minute timer, 30 minute timer e 1 hour timer.

Frequently Asked Questions

Enter the desired values in the hours, minutes and seconds fields, or click one of the quick time buttons (1 min, 5 min, etc.). Then click "Start".
Yes! The alarm uses the Web Audio API which continues working in the background. You will hear the alarm even when on another browser tab.
Yes, click "Pause" to temporarily stop the countdown. Click "Start" again to resume from where you left off.
You can set up to 99 hours, 59 minutes and 59 seconds, covering virtually any timing need.