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Kordu Tools

Countdown Timer

Live countdown to any target date or duration with presets, alerts, pause/resume, reminders, and persistence.

Countdown

Date/time mode · Ready

Push reminders fall back to local browser scheduling unless server push is configured.

Enable this if you want the site to try notifying you after the tab is closed. Browser and device support still apply.

Countdown

25m 0s
00Days
00Hours
00Minutes
00Seconds

Date mode is ideal for deadlines and events.

 

The timer uses your browser clock and persists its current state locally. Notifications, sound, and vibration only fire if you enable them and the browser allows it.

Countdown reminders

Uses the countdown inputs above and stores a browser notification for when the timer ends.

Local fallback

Enable browser notifications to save this countdown as a reminder.

Without VAPID keys configured, reminders stay local to this browser and won't fire when the page is closed.

How to use

  1. 1

    Set a target date and time

    Use the date/time picker to choose when your event happens, or click a preset like New Year, Christmas, or tomorrow morning.

  2. 2

    Try a duration preset

    Switch to duration mode and pick a preset such as 5 minutes, 15 minutes, or 1 hour, or enter a custom duration.

  3. 3

    Add an optional label

    Give your countdown a name such as 'Product Launch' or 'Holiday'. This appears as the countdown heading.

  4. 4

    Enable alerts

    Allow browser notifications and optionally turn on sound or vibration so you are alerted when the timer ends.

  5. 5

    Save a reminder

    Store the current countdown as a reminder so the site can alert you when it finishes.

  6. 6

    See the result

    When the target time is reached, the countdown displays 'Time's up!' in place of the counter.

Frequently asked questions

Does the countdown keep running if I switch tabs?
The browser may throttle the interval when the tab is in the background, but the countdown recalculates from the current time each tick, so it will show the correct value when you return.
Can I set a countdown in the past?
If you set a target date in the past, the countdown will immediately show 'Time's up!' since the target has already been reached.
Are countdowns saved between sessions?
Yes. The current timer configuration is saved in your browser so you can come back to the same setup after a refresh, and you can also save a reminder for the end of the countdown.
Is any data sent to a server?
The countdown runs entirely in your browser. Reminder scheduling only touches the server if you save a browser notification.

Set a target date and time or pick a duration preset to see a live

countdown showing days, hours, minutes, and seconds remaining. Add an

optional label for your event, pause or resume the timer, and enable

browser alerts, sound, vibration, or a saved reminder when the countdown

ends. Use built-in presets for New Year, Christmas, or tomorrow morning,

or enter any custom date or duration. The display updates every second

and shows "Time's up!" when the target is reached. All processing runs

in your browser — nothing is stored or transmitted unless you save a

reminder.

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