Countdown Timer
Count down live to a future date and time in days, hours, minutes and seconds.
This tool runs entirely in your browser. Your files are never uploaded to a server.
Choose a future date and time to start the countdown.
What this tool does
Counts down live to a target date and time you choose, breaking the remaining duration into days, hours, minutes, and seconds that update every second.
How to use it
Pick a target date and time using the datetime picker. The four counters start ticking down immediately and keep updating once per second until the target is reached, at which point they're replaced with a "Countdown complete" message.
Worked example
If you set the target to New Year's Eve at 23:59 and it's currently 3 days, 6 hours, 12 minutes, and 40 seconds before that moment, the four boxes show 3 / 6 / 12 / 40 and keep counting down second by second until midnight.
How the countdown is calculated
The target date/time is interpreted in your browser's local time zone — there's no separate time-zone selector. The remaining time in seconds is floored and split into days (÷86400), hours (÷3600), minutes (÷60), and a leftover seconds remainder, recalculated on every one-second tick from your device's clock.
Limitations
There's only one countdown at a time — no way to save multiple events or name them. The date/time input always uses your browser's local time zone, so sharing a countdown link or screenshot with someone in a different zone means they'd need to convert the target time themselves. If your device's clock is wrong, the countdown will be off by the same amount.
What happens when it finishes
Once the target time passes, the four counters stop and are replaced by a static "Countdown complete" message — there's no sound, notification, or automatic reset to a new target.
Privacy and processing
Everything runs locally in your browser using its own clock. The date and time you choose are never sent to a server.
Frequently Asked Questions
- What time zone is the target date interpreted in?
- Your browser's local time zone — there's no separate time-zone selector, so sharing a countdown with someone elsewhere means they'd need to convert the target time themselves.
- Can I track more than one countdown at once?
- No, only one target date and time is active at a time, and it isn't saved or named — refreshing or navigating away loses the current countdown.
- What happens when the countdown reaches zero?
- The four counters stop and are replaced by a "Countdown complete" message — there's no sound, browser notification, or automatic reset to a new date.