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Free Countdown Timer

Count down to any date and time. Set a custom date or use quick presets (5 min, 15 min, 1 hour). No sign-up needed.

Works offline once loaded
Set a timer
hours
minutes
seconds

Quick countdown

Count down until

Tip: keep this page open so the alarm can sound. The screen stays awake while it runs.

Set a timer above or pick a quick preset, then press Start

Common uses

  • Event Countdown TimerCount down the days, hours, and seconds to a wedding, birthday, concert, or any upcoming event.
  • Deadline Countdown TimerKeep a live countdown to a project deadline, exam, or submission due date to stay on track.
  • Cooking and Kitchen TimerQuick countdown timer for cooking pasta, boiling eggs, baking, and kitchen timing.
  • Meeting and Presentation TimerCount down to the start of a meeting, or use as a visible timer during presentations.
  • Product Launch CountdownBuild anticipation for a product launch, sale, or announcement with a live countdown.

How It Works

The countdown timer runs entirely in your browser with zero external dependencies β€” no libraries, no server calls. It uses a 1-second setInterval that computes the gap between Date.now() and the stored target timestamp on every tick, so the display stays accurate even if the tab is backgrounded or the device clock drifts.

  1. 1
    Set a target
    Choose duration mode (hours, minutes, seconds) or switch to date/time mode to count down to a specific moment. Five quick-preset buttons (5 min through 24 hours) skip the inputs entirely and start the timer immediately.
  2. 2
    Interval ticks against a fixed target
    When started, the tool stores the absolute target as a Date object and fires setInterval every 1000 ms. Each tick calls Date.now() and subtracts from the target β€” so missed ticks (tab asleep, CPU busy) self-correct on the next tick rather than accumulating lag.
  3. 3
    Adaptive display and tab mirroring
    The display drops leading zero units automatically β€” a 45-second timer shows only seconds in large type, while a multi-day timer shows all four units at a smaller size. The remaining time is also written into document.title so the countdown stays readable in a minimized or background tab.
  4. 4
    Web Audio chime on finish
    When the countdown reaches zero, the browser's built-in Web Audio API (AudioContext + OscillatorNode) synthesizes a triple-pulse 880 Hz sine-wave chime β€” no audio file is downloaded. Pause, resume, and shareable URLs (encoding the target epoch in the #to= fragment, which never reaches a server) are also handled entirely client-side.

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Frequently Asked Questions