Online Timer
Start a free countdown timer in your browser. Choose a quick preset or set custom hours, minutes, and seconds with sound alerts.
Work Timer
05:00
Free Online Timer for Work, Study, Cooking & More
AlarmOnline.net provides a simple, free online timer that runs entirely in your web browser. Whether you need a quick 5-minute tea timer, a 25-minute study sprint, or a custom countdown for cooking, you can choose from convenient one-click presets or enter your own hours, minutes, and seconds with audible alarm notifications when time expires.
How to Use This Tool
- 1Select a duration or preset — Choose a quick one-click preset (1 to 60 minutes) or click the countdown digits to enter custom hours, minutes, and seconds.
- 2Add a label (optional) — When configuring a custom duration, enter a label such as "Study Session" or "Baking Timer" to easily keep track of your task.
- 3Press Start — Click the green "Start" button to begin counting down. The timer tracks time accurately in your browser.
- 4Adjust or pause while running — Need more time? Click "+1 min" or "+5 min" to extend your countdown on the fly, or click "Pause" to temporarily hold time.
- 5Sound alert when time expires — When the countdown reaches zero, an audible alarm sound plays continuously until you click "Stop" or "Reset".
Key Features & Capabilities
Quick One-Click Presets
Instantly start popular countdown intervals from 1 minute to 60 minutes with a single click.
Custom Duration & Task Labels
Configure exact hours, minutes, and seconds up to 99 hours with custom task descriptions.
On-the-Fly Time Adjustments
Add +1 minute or +5 minutes to any active or paused countdown without restarting.
Audible Sound Alerts
Plays a distinct audio tone when the timer reaches zero to alert you across rooms and open windows.
Reliable Drift-Proof Tracking
Calculates time against system epoch timestamps, preventing countdown drift when switching between browser tabs.
Integrated Time Tools
Looking for other time tools? Use our Online Stopwatch to measure elapsed laps, create an Event Countdown to a future date, set a specific clock-time alert with the Online Alarm Clock, or check the full-screen Online Clock.
Popular Use Cases
Study & Focus Sessions
Structure deep work and study intervals like Pomodoro focus blocks with dedicated break reminders.
Cooking & Baking
Keep track of boiling pasta, oven baking, tea brewing, and food preparation times.
Work Breaks & Meetings
Time team standups, lightning presentations, brainstorming sessions, and lunch breaks.
Exercise & Workout Intervals
Time rest periods between sets, isometric planks, circuit intervals, and stretching routines.
Power Naps & Rest
Set a short 15- or 20-minute power nap to recharge during the day without oversleeping.
Frequently Asked Questions (FAQ)
How do I set an online timer?
Select one of the quick preset buttons (such as 1, 5, 15, or 30 minutes) or click the large countdown numbers to enter custom hours, minutes, and seconds. Then click the green "Start" button to begin the countdown.
Is this online timer free?
Yes. The online timer on AlarmOnline.net is 100% free to use with no registration, subscription fees, or app downloads required.
Do I need to install anything?
No installation is required. The timer runs directly in modern web browsers across desktop computers, laptops, tablets, and smartphones.
Will the timer continue if I switch to another browser tab?
Yes. The timer calculates remaining duration using system target timestamps, so your countdown stays accurate even when browsing in other tabs or minimizing the window.
Will the timer work if I close the browser?
No. Web browser timers require the active browser tab or window to remain open. If you close the tab or quit the browser, the countdown is terminated.
Will the timer work if my computer goes to sleep?
No. Operating systems suspend browser activity when a computer sleeps, hibernates, or powers down. Keep your computer awake and the browser window open while running a countdown.
Can I set a custom timer duration?
Yes. Click on the digital display numbers to open the custom drawer, where you can set any combination of hours, minutes, and seconds up to 99 hours.
Does the timer make a sound when it reaches zero?
Yes. An audible alarm tone sounds when the timer reaches zero and continues until you click the "Stop" or "Reset" button.
Can I add extra time while the timer is running?
Yes. Click the "+1 min" or "+5 min" quick-add buttons below the display to extend your active or paused countdown without resetting.