Countdown Timer
Pick a date and time and get a live days/hours/minutes/seconds countdown to it, with a shareable link and an alarm the moment it arrives.
Embed this countdown on your own site
Free to use on any site -- it keeps a small "Powered by Just a Timer" credit link, which is the only thing we ask in return.
A fixed instant, not a running total
Picking a date and time converts it, in your browser, into a single absolute timestamp -- the same kind of number the Online Timer uses for its target end time. From then on, every update to the display is one subtraction: that fixed timestamp minus the current time, broken into whole days, hours, minutes and seconds. There's no running clock to drift out of sync and nothing to recalculate differently depending on how long the tab has been open; the target never changes, only how far away it currently is.
Sharing a countdown
Starting a countdown writes the target into the page's own URL as an ISO 8601 timestamp (for example ?to=2026-12-31T23%3A59%3A00.000Z), so the link itself is the countdown -- no account, no database row, nothing that could expire out from under it. Anyone who opens that link sees the identical countdown, computed independently in their own browser from the same target time.
When it arrives
The same alarm system as every other timer on this site -- a synthesized tone, chosen from three options, repeating until acknowledged -- plays once the countdown reaches zero. Mute it, change the tone, or stop an active alarm from the controls under the display.
Counting down to a specific hour instead?
If you always land on the same clock time -- 3 PM, 9 AM, midnight -- a dedicated page skips the date picker entirely and starts counting immediately: how long until 3 PM, until 9 AM, or until midnight.
Frequently Asked Questions
How is this different from the Online Timer?
The Online Timer counts down a plain duration you set -- 10 minutes, 90 seconds -- from the moment you press Start. This tool counts down to a fixed calendar date and time instead, whenever you open the page, whether that's a deadline next Tuesday or a launch three months out.
Does the countdown stay accurate across a daylight saving time change?
Yes. The target you pick and the current time are both converted to an absolute point in time (milliseconds since a fixed reference instant) before any subtraction happens, so the gap between them is exact regardless of whether a daylight saving change falls between now and the target. Daylight saving only affects how a clock face reads a given instant, not the distance between two instants -- so nothing here is approximate.
Can I send this countdown to someone else?
Yes -- after you start a countdown, use "Copy shareable link." It copies the current page URL with the target date and time encoded in a ?to= parameter, so opening that link shows the same countdown, already running, to whoever you send it to.
What happens when the countdown reaches zero?
The day/hour/minute/second display is replaced with "It's time," and the same synthesized alarm used on the Online Timer plays on a loop until you stop it, choose a new target, or leave the page.
Can I count down to a time in the past by mistake?
If the date and time you pick has already passed when you press Start, the countdown arrives at zero immediately and the alarm fires right away -- there's no separate validation step, since "the target is in the past" and "the target just arrived" are the same state as far as the countdown is concerned.
Every timer here runs entirely in your browser -- nothing you set is sent anywhere. The countdown display isn't a substitute for a certified stopwatch or a safety-critical timing device; see the Terms.