Countdown
Countdown Timer
Set a quick countdown for cooking, study sessions, workouts, and daily tasks with the same polished control surface used across ClockUnit.
Live countdown display
Preset Timers
Related ClockUnit tools
Everything you need in a timer
Custom Duration
Set days, hours, minutes, and seconds — from a quick 30-second drill to a multi-day deadline.
Alarm Sound & Loop
Choose from multiple alarm tones and set it to play once or loop until you dismiss it.
Fullscreen Mode
Click fullscreen and the countdown fills the whole display — great for classrooms, gyms, and presentations.
Timer Title
Label your countdown — 'Meeting in', 'Bread in oven', 'Pomodoro' — so it's always clear what's counting down.
Auto-Loop
Enable auto-loop and the timer resets and restarts automatically after each cycle, perfect for intervals.
Mobile-Optimised
Large tap targets and a responsive layout that feels just as good on a phone as on a widescreen monitor.
How to use the timer
Open the page
Navigate to clockunit.com/timer — no login, no download. The timer is ready the moment the page loads.
Set your duration
Enter hours, minutes, and seconds (or pick a quick preset like 5 min, 10 min, 25 min).
Customise & start
Optional: add a title, pick an alarm sound, or toggle auto-loop. Then press Start.
Handle alerts
When time runs out the alarm sounds and a notification appears. Dismiss or let it loop.
Who uses this timer?
Study sessions
Run timed reading blocks, essay drafts, or exam simulations.
Cooking
Set kitchen timers without hunting for a physical clock.
Workouts
Time rest intervals, HIIT circuits, and plank holds precisely.
Meetings
Keep presentations and standups on schedule without going over.
Games
Speed challenges, tournaments, and timed quiz rounds.
Parenting
Screen time limits, timeout timers, and nap countdowns.
Why use ClockUnit instead of an app?
A dedicated timer app needs installation, storage, and often requests unnecessary permissions. ClockUnit runs right in your existing browser — no install, no tracking, nothing leaves your device. It works on Windows, macOS, Linux, Android, and iOS.
Unlike a phone timer that disappears when you switch apps, ClockUnit stays visible in its tab and can alert you the moment time runs out — even if the tab was in the background.
Frequently asked questions
Online Timer with Sound and Presets
ClockUnit provides a high-performance online timer designed for reliability and ease of use. Whether you need a simple countdown timer for a 5-minute break or a precise countdown timer with alarm for workout intervals, our tool starts instantly with no sign-up. You can set timer online with customizable sounds, fullscreen mode, and saved presets. It’s the perfect timer with sound for cooking, classroom management, or time-blocked tasks.