Countdown Timer

Full-screen countdown with presets, alarm and shareable links.

How to use

1. Choose a preset or type hours, minutes and seconds.
2. Press Start or Space. The tab title shows the time left.
3. An alarm sounds when time is up. Press F for a full-screen display.

Good for

• Cooking, workouts and study blocks
• Meeting and presentation timing
• Classroom and game countdowns
• Sharing a timer link, for example /tools/countdown-timer?t=300

Questions

Can I share a timer?

Yes. Add ?t=SECONDS to the page address, for example ?t=600 for ten minutes.

Does it keep running in the background?

Yes. It uses the clock, not a frame counter, so it stays accurate when the tab is hidden. Browsers may limit sound in background tabs.

Will the alarm be loud?

It is a short series of beeps. Check your device volume first.

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