A website countdown timer compares a fixed deadline with the visitor's clock once a second and shows the days, hours, minutes and seconds left. Set your date, time and time zone below, choose a style, and copy self-contained HTML or a React component. The code runs on your page with no third-party script or account.
| Kind | Deadline | Use it for |
|---|---|---|
| Fixed date | The same moment for everyone | Launches, events, sales that end at a real time |
| Per visitor | A set number of hours after each visitor's first view | Welcome offers that genuinely expire for that person |
Updated
Pick a date and the time zone the deadline belongs to, choose one of three styles and an accent colour, and see the live result below. The output is one block of HTML, CSS and JavaScript, or a React component with Tailwind classes.
A date like 1 December at 9:00 means different moments in Toronto and in Karachi. Storing the deadline as a UTC timestamp removes that ambiguity, and it also handles daylight saving changes, since the conversion uses the rules of the zone you picked for that exact date.
The script then subtracts the current time from the deadline on every tick and splits the difference into days, hours, minutes and seconds.
Browsers slow down timers in background tabs, so a countdown that simply subtracts one second per tick drifts. This code recalculates from the clock each time and schedules the next update for the start of the next second, so it stays correct when the tab comes back.
There is no library and no external request, which keeps the page fast and avoids sending visitor data to a widget provider.
Copy the HTML embed and paste it into your page where the timer should go. Most site builders have an HTML or embed block for this. If your site is built with React, copy the component instead and render it like any other component.
Yes. The tool converts your date and time zone into one exact moment in UTC and writes that number into the code. Every visitor's browser counts down to the same moment, whatever their local time.
It starts each visitor's countdown at their first view and saves that moment in their browser, so a refresh does not restart it. Clearing site data or switching devices starts a new one, so only use it for offers you are happy to honour in that case.
No. Email clients do not run JavaScript. Email countdowns are animated images generated by a server at the moment the email is opened, which a static page cannot provide.
Related: How to make a coming soon page, Animated counter generator, Unix timestamp converter, HTML embed code generator, CSS animation generator.
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