Countdown Timer

A countdown you can send to anyone.

FREE · NO SIGN-UP · RUNS ON YOUR DEVICE

The countdown lives in the link

  • 1link to share
  • 0accounts
  • 0data stored
  • Freeno sign-up
In practice

What you can count on

  • 0data stored
    • The countdown is the address itself
    • Nothing is written down on any server
  • 1link
    • Send it and everyone sees one clock
    • It keeps working as long as you keep it
  • 4figures
    • Days, hours, minutes and seconds
    • Counting up again once it passes
Specification

Countdown Timer at a glance

What you set
Date, time and a name
The shared link
The whole thing is in the address
Time zones
One instant for everyone
After it passes
Counts up once it is past
Background tabs
Catches up when you return
Where it runs
In your browser, nothing sent
Price
Free
Account required
No
How to

How to use Countdown Timer

  1. 1

    Pick the moment

    A date and a time, or one of the quick choices for tomorrow, a week, a month or a year.

  2. 2

    Name it

    Whatever you are counting down to. The name sits above the clock and travels in the link.

  3. 3

    Copy the link

    Send it to anyone. They see the same clock, counting to the same second, with nothing to sign up for.

Questions

Frequently asked questions

How can a link work with no account?

Because the countdown is the link. The moment and the name are written into the address as ordinary parameters, and the page reads them when it opens. There is nothing on a server to look up, and nothing to expire.

Will someone in another country see the same numbers?

Yes. The link carries the instant itself, counted from a fixed point in time, not the hour showing on your clock. Each person's page then shows that instant in their own zone, and all the countdowns agree.

Does it keep running if I close the tab?

There is nothing to keep running — the clock is worked out from the moment in the link each time the page opens. Close it, open it a week later, and it is still counting correctly.

Why did the seconds jump when I came back to the tab?

Browsers slow down tabs that are not on screen, so the ticking pauses. The page reads the real time again as soon as you return, which is why the figures catch up in one step rather than drifting.

Can I count down to something in the past?

Yes. Pick a date that has been and it counts upward instead, saying how long ago the moment was. It is the same arithmetic read the other way.

Background

Counting to one moment

Pick the moment, give it a name, and copy the link. Anyone who opens it sees the same clock, counting to the same second, wherever they are.

  • A launch, a deadline, a flight, an exam — anything with one agreed moment works.
  • Give it a name before you send it. A clock with no label is a clock nobody acts on.
  • The address is the whole countdown, so a bookmark is as good as an account.
  • Past dates count upward, which is a fair way to read how long something has been running.

Full specification

Specification of the Countdown Timer tool
What you setA date, a time to the minute, and a name to put above the clock.
The shared linkThe moment and the name are carried in the address as plain parameters. Nothing is stored, so there is nothing to expire.
Time zonesThe link carries the instant, not the wall clock, so everyone counts to the same second wherever they are.
After it passesIt keeps counting, upward, and says how long ago the moment was.
Background tabsA hidden tab is slowed by the browser, so the clock is set right again the moment you come back.
Where it runsIn your browser tab. No countdown is sent anywhere or kept.
PriceFree
Account requiredNo
Next step

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