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Countdown timer

Set a target date and time to count down live, and share it with a link.

How Countdown timer works

Countdown Timer lets you pick any future date and time and watch a live counter tick down days, hours, minutes and seconds until that moment arrives. The target date and time are encoded directly into the page URL as query parameters, so you can share a link with a colleague or bookmark it; the date is stored in the URL itself, not on any server. Everything runs in the browser using the JavaScript Date API and your device's clock.

Because the target is in the URL, anyone who receives the link sees the exact same countdown to the exact same moment. The countdown is not tied to any account and requires no registration. When the countdown reaches zero the display changes; it does not send a notification to any external service. If you need an audio alert at zero, the dedicated Timer tool is the more appropriate choice.

Written by Bastien Sulyan

How to use Countdown timer, step by step

  1. Select the target date using the date picker.
  2. Set the target time using the hour and minute fields.
  3. Click start to begin the live countdown.
  4. Copy the URL from your browser address bar to share the countdown with others.
  5. Bookmark the URL to return to the same countdown later.

Common use cases

  • A project manager shares a countdown link with the team so everyone sees the same deadline in real time regardless of timezone.
  • An event organiser embeds the shareable countdown URL in a newsletter so subscribers can see exactly how many days remain until ticket sales open.
  • A student bookmarks a countdown to their exam date and checks it each morning to gauge how much preparation time remains.
  • A product team tracks the hours until a planned public launch by sharing the countdown link in a team chat channel.

Frequently asked questions

Where is the target date stored?

The target date and time are encoded as query parameters in the page URL. Nothing is saved to a server or database. Sharing the link is sufficient to share the countdown, because all the information needed to reconstruct it is contained in the URL string itself.

What happens when the countdown reaches zero?

The display changes to indicate the target moment has passed. The tool does not send any push notification, email or alert to an external service. If you want an audible signal when a timer expires, use the Timer tool instead.

Does the countdown adjust for the viewer's timezone?

The countdown always measures the difference between the current device time and the target time stored in the URL. If two people in different timezones open the same link, they both see the same remaining duration because both are measuring the same absolute moment on the clock.

Can I count down to a date in the past?

Setting a past target will show a negative or elapsed display indicating how long ago that moment was. The tool does not prevent past dates; the elapsed time since a past event can itself be a useful display.

Does the page need to stay open for the countdown to run?

The countdown is computed each time the page is rendered; it uses the current device time minus the target. If you close and reopen the page (or the shared URL), the remaining time shown will be correct based on the actual elapsed wall-clock time.

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