Frequently Asked Questions
Common questions about StopwatchPro's stopwatch, lap timer, and countdown tools.
Is StopwatchPro really free to use?
Yes. StopwatchPro is completely free with no sign-up, no download, and no hidden fees. It runs directly in your browser.
How accurate is the online stopwatch?
StopwatchPro measures time to the millisecond using your browser's high-resolution timing functions, making it accurate enough for workouts, cooking, races, and lab timing.
Does StopwatchPro work without an internet connection?
Yes, once the page has loaded once, the stopwatch continues to function offline since all timing happens locally in your browser.
Can I use StopwatchPro on my phone?
Yes. The layout is responsive and the Start/Lap/Reset controls are large enough for touch use. Keyboard shortcuts apply only on devices with a physical or connected keyboard.
Is there a limit to how many laps I can record?
No — you can record laps for as long as the browser tab stays open and active.
Does StopwatchPro collect or store my timing data?
No. All timing happens client-side in your browser; nothing is sent to a server or saved after you close or refresh the tab. See our Privacy Policy for details.
Can I run multiple stopwatches at once in different tabs?
Yes, each browser tab runs its own independent instance.
Why does the millisecond display sometimes skip numbers?
Browsers update the display roughly 60 times per second, so at very fast refresh rates you may see the millisecond counter skip by more than 1 between renders — the underlying elapsed-time measurement itself remains accurate.
Do you also have a countdown timer?
Yes — see our Countdown Timer for setting a fixed duration or counting down to a specific time.