About Countdown Timer
This free online countdown timer works directly in your browser โ no app or download needed. Set a timer by entering hours, minutes and seconds, or use quick presets for common durations like 5 minutes, 25 minutes (Pomodoro technique) or 1 hour. The alarm sound plays when the timer ends.
The date countdown mode calculates the exact time remaining to any future date and time โ useful for exam dates, event countdowns, product launches, or important deadlines.
Frequently Asked Questions
Does the timer work if I switch browser tabs?+
Yes. The timer uses system time, not animation frames, so it continues counting accurately even if the tab is in the background. The alarm sound will play when the tab regains focus.
What is the Pomodoro technique?+
The Pomodoro technique is a time management method where you work for 25 minutes (one "Pomodoro"), then take a 5-minute break. After 4 Pomodoros, take a longer 15-30 minute break. Use the 25 min preset for Pomodoro sessions.
Can I set a timer for more than 24 hours?+
Yes. Enter up to 99 hours in the hours field. For longer countdowns (days or weeks), use the "Countdown to Date" mode which accepts a specific date and time.
Will the alarm sound even if my device is on silent?+
The alarm uses the Web Audio API. If your browser tab is muted or your device is on silent, you may not hear the sound. The on-screen alarm message will still flash.
Can I use this timer for exam preparation?+
Yes. Set the timer to 3 hours (180 minutes) for full mock exams, or use shorter timers for section practice. The Pomodoro preset (25 minutes) is excellent for focused study sessions.