Stopwatch
A simple online stopwatch with lap times, right in your browser.
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Key features
Start, pause, and reset a precise stopwatch, and record lap times as you go — useful for timing a workout, a presentation, or anything else you’re clocking.
The timer runs entirely in your browser using precise, high-resolution timing. Nothing is recorded or sent anywhere — closing this page clears it.
How to use
Press Start
The stopwatch begins counting immediately.
Tap Lap to record a split
Each lap records the time since the last lap and the total elapsed time.
Pause or reset anytime
Pause to freeze the clock, resume to continue, or reset to start over.
Frequently asked questions
How accurate is this stopwatch?
It uses the browser’s high-resolution performance timer, which is accurate to a fraction of a millisecond — far more precise than the hundredths-of-a-second display shown.
Will it keep running if I switch tabs?
Yes — the elapsed time is tracked from real timestamps, not by counting frames, so it stays accurate even if the browser throttles the tab in the background.
Is my time or lap data saved anywhere?
No. Everything resets when you refresh or leave the page, and nothing is ever sent anywhere.