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OneFlipClock

Stopwatch

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A stopwatch that counts up from zero — no laps to manage, nothing to sign into, and accurate even while you work in another tab.

Frequently asked questions

Does it keep counting in another tab?
Yes. Elapsed time is derived from the clock rather than from how often the browser runs the page, so it stays accurate after the tab has been hidden for a long time.
Can I pause and continue?
Yes — pause holds the elapsed time, and starting again picks up from there.
Is there a lap function?
Not at the moment. This is deliberately a single-purpose stopwatch: start, pause, reset.