Countdown Timer
Run a timer (1, 5, 25 minutes or custom) or count down to a date, with pause, a sound alert, notifications and share links.
How to use
- “Timer”: click 1, 3, 5, 10 or 25 min to start right away, or enter hours, minutes and seconds and click “Start”. Pause, resume or reset at any time.
- “Count down to a date”: enter a date and time (such as 2027-01-01 00:00) and an optional event name to see the days and hours left.
- Click “Copy share link” to send the countdown to someone; the link opens the same countdown to the same moment.
- When time is up, an alert appears on the page. Under “Alerts” you can turn on a sound and system notifications, and the tab title shows the time left.
FAQ
Does the countdown drift in a background tab?
No. The time left is always computed as the end time minus the current time, not by counting ticks, so browsers slowing down background timers cannot make it drift. The alert itself may come up to about a minute late in a background tab, so keep the tab in front when the exact moment matters.
Why is there no sound?
Browsers only allow sound after you click or press a key on the page, so click any button (such as “Start”) first, and check that your device is not muted. The beep is generated with Web Audio; no audio file is downloaded.
How do I turn on notifications?
Turning on “Show a system notification” makes the browser ask for permission. Notifications are only sent after you allow them; otherwise the alert still appears on the page.
What does the share link contain?
Only the target date, time, time zone and the event name you typed, all visible in the URL, so do not put anything private in the name. Timers have no share link.
What if someone opens the link in another time zone?
The link keeps the time zone it was created in, so everyone counts down to the same moment, and the page also shows the target in the visitor’s local time.
Is my data uploaded?
No. The countdown runs entirely in your browser; only the sound and notification settings are stored in this browser’s localStorage.