About the Online Countdown Timer
A clean, drift-free countdown timer built for the browser — duration or date mode, alarm included.
What it is
The Computezy Countdown Timer is a free browser-based timer that counts down to zero from any duration you set, or to any future date and time you pick. It shows a large, easy-to-read display, sounds an alarm when done, and keeps accurate time even if you switch browser tabs.
Everything runs in your browser. No data is stored or sent anywhere — close the tab and all state is gone.
Two modes
Duration mode
Set hours, minutes, and seconds manually, or tap a quick preset (1, 3, 5, 10, 30, 60 min). Ideal for cooking, study sessions, workouts, and meetings.
Target Date mode
Pick any future date and time and watch the timer count down to that moment. Shows days remaining when the target is more than 24 hours away. Ideal for events, deadlines, and launches.
Key features
Audio alarm
A three-beep alarm plays via Web Audio API when the timer hits zero — works even if the tab is in the background.
Screen wake lock
On supported browsers, prevents the screen from turning off while the timer is running. Degrades gracefully where unsupported.
Pause & resume
Freeze the countdown at any point and pick up exactly where you left off — no drift, no restart needed.
Drift-free engine
Uses wall-clock timestamps (Date.now) rather than accumulated intervals, so it stays accurate over long runs.
Optional label
Add a name to remind yourself what each timer is for — "Tea", "Pomodoro", "Meeting". Shown on the display while running.
Auto-repeat
Enable Repeat and the timer automatically restarts after each completion — useful for intervals and repeated work blocks.
Common uses
Cooking
Set a boil or bake time, leave the tab running, and the alarm sounds when it's done.
Studying
Time focused work blocks and breaks without watching a clock — pair with auto-repeat for Pomodoro-style sessions.
Meetings & presentations
Keep talks on schedule with a visible countdown that the whole room can see.
Events & deadlines
Count down to a launch, release, or deadline in Target Date mode — shows days, hours, minutes, and seconds.
Completely free
No account, no rate limit, no premium tier. Use it as often and as long as you need, on any device, without installing anything.