Countdown Timer
Set a timer and get alerted when time is up
Set Timer Duration
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Quick Start
Countdown Timer
Set a timer and get alerted when time is up
Features
- Set hours / minutes / seconds and count down to zero
- Audio notification when the timer reaches zero
- Pause / resume mid-countdown
- Common-duration presets (1 min, 5 min, 10 min, 15 min, 30 min, 1 hour)
- Tab-title updates so the remaining time is visible even when the tab is backgrounded
How to use
- Enter hours, minutes, and seconds, or click a quick preset button.
- Press Start to begin the countdown.
- Use Pause/Resume to control the timer, or Reset to start over.
- When time is up, an audio alert will sound. Click Dismiss to stop it.
Tips & Best Practices
- Background tabs throttle setInterval — the title-bar timer is the most reliable indicator when the tab is hidden.
- Audio notifications need a user interaction first (browser autoplay policy) — click Start at least once before the first notification triggers.
- For longer durations or work/break cycles, use the Pomodoro Timer tool instead.
- Pause holds the countdown without resetting; Resume picks up where it left off.
- Refreshing the page resets the timer — state is not persisted.
FAQ
Does the timer work in the background?
Yes, the countdown continues running even if you switch to another tab. However, the audio alert requires the tab to be active in some browsers.
Can I add extra time while the timer is running?
Yes, click the '+1 min' button to add 60 seconds to the running or paused timer.
Is there an audio alert?
Yes, the timer plays a series of beep tones using the Web Audio API when the countdown reaches zero. No external audio files are needed.
Is this tool free to use?
Yes, completely free with no registration, no limits, and no hidden costs.
Does it work offline?
Once loaded, the tool works entirely offline. All processing is done client-side.