Local countdown timer with 24-hour format custom hours/minutes/seconds. Freely adjust panel background and font colors. All processing happens locally in your browser — no data upload.
Features
- Flexible time settings.
- 24-hour format: Supports countdowns up to 24 hours.
- Combined H:M:S picker: Narrow scroll columns for hours, minutes, and seconds.
- Confirm to start: Footer Clear zeros the draft; OK begins the countdown.
Use Cases
- Focus work: Pomodoro Technique time management.
- Study timer: Exam simulation, homework timing.
- Meeting reminder: Control meeting/presentation duration.
How to Use
Set countdown duration. Open Duration in the toolbar. Pick hours, minutes, and seconds in the three-column wheel, then tap OK (use Clear to zero first if needed). Countdown starts automatically; the display updates remaining time in real time. When duration is set, use Picture-in-Picture to keep the timer above other windows, or Fullscreen.
Notes
- Time limit: Single countdown supports up to 24 hours (86,400 seconds).
- Browser compatibility: Fullscreen needs Fullscreen API; Picture-in-Picture needs Chromium video PiP (falls back to an in-page float).
- Page refresh: Refreshing the page resets the countdown — save important settings.
Related Keywords
Countdown Timer, Online Countdown, countdown, Sanye Hub, Online Tools, 24