Online Stopwatch
A simple, free, and accurate online stopwatch. Start, stop, reset, and record laps with millisecond precision.
About Online Stopwatch
An Online Stopwatch is a free web-based tool that measures elapsed time with millisecond precision. Unlike traditional physical stopwatches, our digital timer is always accessible from any device with a browser. Perfect for fitness training, running, athletics, cooking, study sessions, and any activity requiring accurate time tracking.
Our browser-based stopwatch features intuitive start, pause, and resume controls, along with a powerful lap recording system. Track multiple split times while the main timer continues running—ideal for interval training, race lap timing, or monitoring consecutive events. The high-precision timer uses your browser's requestAnimationFrame API for professional-grade accuracy.
Designed with privacy and simplicity in mind, this free online stopwatch runs entirely in your browser. No downloads, no installations, no signup required. Your timing data never leaves your device, ensuring complete privacy. The responsive design works flawlessly on desktop, tablet, and mobile devices.
Key Features of Online Stopwatch
Everything you need for professional online stopwatch
Start, Pause & Resume
Easily start, pause, and resume your timer with a single click. The state is clearly displayed for intuitive control.
Lap Recording
Record split times or laps while the main timer continues to run. All laps are saved in a clean, scrollable list.
Simple Reset
Reset your timer and clear all recorded laps instantly. Start fresh with one click when your timer is paused.
Millisecond Accuracy
Our timer uses your browser's high-precision clock to provide millisecond accuracy for professional-grade timing.
Clean & Simple UI
A minimal, large-display interface that is easy to read at a glance, with no clutter, ads, or distractions.
100% Private
All timing happens in your browser. Your data, times, and laps are never uploaded, ensuring complete privacy.
How to Use Online Stopwatch
Follow these simple steps to get started
Start the Stopwatch
Click the 'Start' button to begin timing. The stopwatch will start counting up from zero with millisecond precision.
Record Laps (Optional)
While the stopwatch is running, click the 'Lap' button to record split times. The main timer continues while lap times are saved.
Pause or Reset
Click 'Pause' to stop temporarily or 'Reset' when paused to clear the timer and all recorded laps back to zero.
Pro Tips
- Use the lap feature for interval training - record each interval while the main timer keeps running.
- The stopwatch continues running even when you minimize your browser or switch tabs.
- Perfect for timing multiple events in sequence - just record a lap at each milestone.
- For athletics and running, use the large display for easy reading from a distance.
- Double-check lap times in the scrollable list - newest laps appear at the top.
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Frequently Asked Questions
Everything you need to know about Online Stopwatch
What is an Online Stopwatch?
An Online Stopwatch is a free digital tool used for measuring elapsed time. You can start, stop, pause, and reset the timer with millisecond accuracy. It's perfect for timing sports, workouts, cooking, studying, or any activity where you need precise timing.
How do I use the stopwatch?
Click the 'Start' button to begin timing. The button will change to 'Pause', which you can click to stop the timer. Click 'Start' again to resume. The 'Reset' button (visible when paused) clears the timer to zero, and the 'Lap' button (visible when running) records the current time without stopping the main timer.
What is a 'Lap'?
A 'lap' is a feature that allows you to record the time at a specific moment while the main timer continues to run. This is useful for timing multiple consecutive events, like laps in a race or intervals in a workout. Each lap time is added to a list for your review.
Is my timing data safe and private?
Absolutely! This stopwatch runs entirely in your browser. No data, lap times, or usage information is ever sent to our servers. Your timing is 100% private and secure, and it even works offline.
Does this stopwatch work on mobile?
Yes! The Online Stopwatch is fully responsive and designed to work perfectly on all devices, including desktops, tablets, and mobile phones. The large buttons and clear display make it easy to use on the go.
How accurate is the stopwatch?
Our stopwatch uses your browser's high-precision timer (requestAnimationFrame) to provide millisecond accuracy. The display shows hours, minutes, seconds, and centiseconds (hundredths of a second), making it suitable for professional timing needs.
Does the stopwatch work when I minimize my browser?
Yes! The stopwatch continues running in the background even when you minimize the browser or switch tabs. The timing remains accurate, and you can return to see your elapsed time at any moment.
Will the stopwatch keep running if I close the browser?
No, the stopwatch will stop if you close the browser tab or window. Keep the page open to maintain your timing session. The tool is designed to run actively in your browser for real-time accuracy.
Still need help?
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