Free utility tool
Online Stopwatch
A precise stopwatch with lap times — start, pause and reset instantly.
Runs 100% in your browser. Your data is never sent anywhere.
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Why use this tool
A stopwatch measures elapsed time with start, pause and reset controls. This one adds lap recording so you can time segments of a workout, run or task.
It runs entirely in your browser with millisecond precision — perfect for workouts, cooking, experiments and time tracking.
Features
Start / pause / reset
Lap times recorded
Millisecond precision
Works offline, no account
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How it works
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1
Click "Start"
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2
Press "Lap" at each split
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3
Click "Reset" to clear
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Frequently asked questions
Is the stopwatch accurate?
It uses the browser clock with millisecond precision, accurate to about 10 ms for typical sessions.
Does it keep running if I leave the tab?
Browsers may throttle background tabs. Keep the tab open for best accuracy.
Can I use it as a countdown timer?
This tool is a stopwatch (counts up). Countdown needs a separate timer.