Toolwinder
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Countdown Timer

Set a custom countdown timer with alarm. Runs completely in your browser.

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About This Tool

Set a target time and let it count down to zero with an audible alarm at the end, useful for cooking, presentations, or anything with a deadline. The countdown keeps ticking accurately even under heavy browser load, and you can pause and resume without losing track.

Frequently Asked Questions

Will the countdown alarm sound if my tab is in the background?+
Yes. The alarm uses the Web Audio API to synthesize a high-reliability audio beep, and standard HTML5 audio fallback, which works in background tabs as long as you have interacted with the page at least once to grant audio permissions.
How accurate is the countdown timer?+
It uses system time deltas rather than standard setTimeout intervals, ensuring that even if the browser slows down or suspends background scripts, the countdown adjusts perfectly.
Can I pause and resume the countdown?+
Absolutely. You can pause the countdown at any point and resume it exactly where you left off.

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