Time
Countdown Timer
Set a timer, pause or resume it, and keep track in fullscreen or night mode.
00:00:00Ready
Set the hours, minutes, and seconds, then start the timer. Night mode is saved on this device.
What is Countdown Timer?
Set hours (0–99), minutes and seconds (0–59), then start. Pause keeps the remaining duration; reset restores the entered duration. The timer uses the device clock and does not continue across a page reload. Sleeping devices and background-tab restrictions can delay the display or completion sound; this is not a safety-critical alarm. Duration and night-mode settings are saved on this browser.
Examples
- 00:01:30 = 90 s
- 99:59:59
How to use Countdown Timer
1. Set the hours, minutes, and seconds. 2. Click Start to begin the countdown. 3. Use Pause, Resume, or Reset as needed. 4. Switch to Night Mode or Fullscreen for better focus.