About this countdown timer
This free online countdown timer works in two modes. In Date & Time mode, you pick a specific target date and time and the timer counts down automatically — useful for countdowns to events, deadlines, birthdays, or launches. In Duration mode, you enter hours, minutes, and seconds, then start the timer manually — ideal for cooking, workouts, study sessions, or any timed task. Both modes show days, hours, minutes, and seconds in a large, easy-to-read display.
How to use the countdown timer
For a date countdown, select Date & Time mode and use the date-time picker to choose your target moment — the timer starts counting down immediately. For a duration countdown, select Duration mode and enter the desired hours, minutes, and seconds, then press Start. Press Pause to freeze the timer and Start again to resume. Press Reset to return to zero and re-enter a new duration. When the countdown reaches zero, a "Time's up!" message is displayed.
Common uses for a countdown timer
Countdown timers are useful in a wide range of everyday situations. Teachers use them to time in-class activities and exams. Athletes use them for interval training and rest periods. Cooks use them to track boiling, baking, and resting times. Presenters and speakers use them to keep talks within their allotted slot. Project managers and students use date countdowns to track days until a deadline or exam. A visible countdown creates natural urgency and helps with time management.
Runs entirely in your browser
This countdown timer uses JavaScript's setInterval and Date.now() to track time accurately without any server communication. No data is sent anywhere — your target time and duration stay private on your own device. The timer runs correctly even if you switch browser tabs, because it computes elapsed time from the wall clock rather than counting individual ticks. For very long countdowns (days or weeks), refreshing the page with the same date selected will resume the countdown accurately.