Countdown Timer

Set a countdown by duration or target date with alarm sound. Full-screen display mode. Free, no signup, runs in your browser.

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Frequently asked questions

Keeps running in background tabs?
Yes. Timer uses an absolute end timestamp so even if throttled it resyncs to correct remaining time when active.
Alarm sound?
Short multi-tone beep via Web Audio API when countdown hits zero. No audio file, works offline.
Countdown to specific date?
Yes. Switch to To Date tab and pick any future date/time.