Online stopwatch with 10 millisecond precision and split lap recording. Start, pause, resume and reset without losing your place. Free, no sign-up. All processing runs locally in your browser. Your data is not uploaded to any server.
100% Local Processing
How to Use
A precise stopwatch that measures down to 10 milliseconds. Record unlimited split laps and keep the page open while you work, cook or train.
Steps
Press Start to begin timing immediately.
Press Lap to record a split while the clock keeps running.
Press Pause to freeze, Start to resume, or Reset to clear.
What the display shows
Elapsed time to a tenth of a second, in HH:MM:SS.c format.
Each lap records its own split plus your total elapsed time.
Lap splits are listed newest first so the latest is always on top.
Pause and resume leave your accumulated time untouched.
Features
Updates every 33 milliseconds with no flicker.
Unlimited laps, all kept in the page while it is open.
Nothing is uploaded: timing runs entirely on your device.
All processing runs locally in your browser. Your data is not uploaded to any server.