Countdown Timer — NumGenie

Countdown Timer

Set a date and time, then share the link. Optional sound alert when time is up.

00d 00h 00m 00s

Link includes your target as query params (?d=YYYY-MM-DD&t=HH:mm). Uses your device timezone.


How to use the Countdown Timer

  1. Pick a target Date and Time.
  2. Select Start to begin the live countdown (days · hours · minutes · seconds).
  3. Use Pause to freeze the timer, Reset to clear it.
  4. Turn on Sound when finished if you want an alert at zero.
  5. Click Copy link to share a shareable countdown link with the target pre-filled.

Examples

  • Deadline today 17:00 → set today’s date and 17:00 to run an online countdown for work or study.
  • Event next month → choose the event date/time and share the link so everyone sees the same days, hours, minutes, seconds left.

Tips

  • The countdown uses your device timezone. If you share the link, others will see it in theirs.
  • Need only time math? Try an add hours & minutes calculator for quick duration sums.
  • For big dates, a dedicated weeks-until page can be easier to share.

Related tools

Week Number Today (ISO-8601) · Working Days Calculator · Add Hours & Minutes Calculator · Weeks Until Christmas 2025 · Unix Timestamp ⇄ Date Converter

Quick FAQ

Can I share the exact countdown?

Yes. Use Copy link to share a URL with the date and time in the query string. Anyone opening it sees the same timer.

Why does my friend see a different time left?

Timezones. The target is the same moment in time, but each device shows it in local time.

Does the alert work in the background?

The page needs to be open and your browser must allow audio for the sound to play at zero.