Online Timer — Free Online Tool
Set a countdown and get an alert when time is up.
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About Online Timer
The Online Timer is a countdown clock you set in hours, minutes, and seconds, then start, pause, and reset as needed. It is perfect for cooking, workouts, study sessions using the Pomodoro method, timed presentations, and any task that benefits from a clear deadline.
When the countdown reaches zero, the timer shows an on-screen alert and plays a short audio beep so you do not miss it. Timekeeping is based on the real clock rather than a simple counter, which keeps it accurate even if the tab is busy.
How to Use Online Timer
- Enter the hours, minutes, and seconds for your countdown.
- Click Start to begin the timer.
- Use the same button to pause and resume as needed.
- Click Reset to return to your set time at any point.
Key Features
Set countdowns in hours, minutes, and seconds
Start, pause, resume, and reset controls
Audible beep and on-screen alert when time is up
Accurate timing based on the system clock
Clean monospace display that is easy to read
Frequently Asked Questions
Will the timer alert me when it finishes?
Yes. When the countdown hits zero it shows a pop-up alert and plays a short beep so you know time is up.
Can I pause and resume the countdown?
Yes. The start button doubles as a pause button, letting you stop and continue without losing your remaining time.
Does the timer stay accurate in a background tab?
It calculates time from the real clock, so the final result stays accurate even if the browser slows updates while the tab is inactive.
Do I need to install anything?
No. The timer runs directly in your browser with no downloads or sign-up required.