Countdown Timer
Free online countdown timer with presets, optional sound alerts, and full-screen mode.
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Use Cases
Discover practical ways to use the Countdown Timer:
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Pomodoro Work Session
Focus on writing for 25 minutes using the Pomodoro technique with visual circular progress and an optional audio alert.
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Quick Custom Timer
Set a 3-minute timer for a student presentation using custom time inputs.
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Pause and Resume
Handle interruptions by pausing the timer, then resume to continue accurate time tracking.
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Visual Full-Screen Mode
Project the countdown on screen for room-wide visibility with the full-screen timer display.
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Recurring Interval Timer
Enable Auto Restart to repeat stretches, drills, classroom rotations, or other recurring intervals without re-entering the duration.
Countdown Timer FAQ
- Does the timer keep running if I switch tabs?
- Usually yes, but background tabs or power-saving modes can delay updates and sound alerts, especially on mobile devices.
- What do Auto Restart and Sound On do?
- Sound On plays a local browser alert when time is up. Auto Restart immediately starts the same duration again after completion.
- Are my settings saved?
- Yes. The Sound On and Auto Restart options are saved only in this browser using local storage.
- Does this timer send my countdown to a server?
- No. Countdown values stay in your browser. The site may still load production analytics, but the timer does not upload your times.
- Why does full-screen mode not open?
- Some browsers, device modes, or embedded contexts block the Full Screen API. If that happens, the timer continues working in the normal layout.