How to Use This Online Stopwatch
Click 'Start' or press Space to begin timing.
Click 'Lap' or press 'L' to record a split time.
Click 'Stop' or press Space to pause.
Click 'Reset' or press 'R' to clear all data.
Key Features
Frequently Asked Questions
How accurate is this online stopwatch?
Our stopwatch uses the high-resolution `performance.now()` API, providing sub-millisecond precision. It is as accurate as your device's internal clock.
Can I use this stopwatch offline?
Yes! Once the page is loaded, the stopwatch logic runs entirely locally in your browser. You can lose internet connection and it will continue to function perfectly.
Are there keyboard shortcuts?
Absolutely. Use 'Space' to Start/Stop, 'L' to record a Lap, and 'R' to Reset the timer for faster control.
Is my data saved if I close the tab?
Yes, we automatically save your current time and lap history to your browser's local storage so you can resume where you left off.
Can I export my lap times?
Yes, you can click the 'Copy CSV' button to copy all your lap data to your clipboard, which can then be pasted into Excel or Google Sheets.
Does it work on mobile devices?
Yes, the interface is fully responsive and optimized for touch, making it easy to use on any smartphone or tablet.
Is this stopwatch free to use?
Yes, this is a 100% free tool with no registration required and no hidden costs.
What are lap statistics?
We automatically calculate your fastest, slowest, and average lap times to help you analyze your performance at a glance.
Is there a fullscreen mode?
Yes, click the expand icon to enter fullscreen mode, which is perfect for presentations or large displays.
Does this stopwatch drain my battery?
We use optimized `requestAnimationFrame` logic which is highly efficient and minimizes CPU usage compared to traditional intervals.