Countdown Timer

Count down to any date and time with alerts.

Label (optional)

Target date & time

Browser notification Sound alert

How to use

Pick a target date and time, or choose a duration in hours, minutes, and seconds.
Add an optional label so you remember what you are counting down to.
Press Start to begin the countdown, or use the full-screen toggle for events and meetings.
When the timer hits zero an alarm plays and the screen flashes.
Save the timer in your browser to keep counting down even if you refresh the page.

Frequently asked questions

Does the countdown keep running with the tab in the background?

Yes. The remaining time is calculated from the target timestamp on each tick, so backgrounded tabs still finish at the correct moment even if the display updates less frequently.

Can I share a specific countdown with someone?

Yes. After setting your target, the URL updates with the parameters baked in, so you can copy the link and send it to anyone.

Will it work without an internet connection?

Once the page has loaded, the timer is fully client-side and works offline. The PWA caching also keeps the tool available for repeat visits.

Can I count down past zero?

Yes. After the target moment passes the timer flips into elapsed mode so you can see how long ago the event happened.