Does the timer keep running if I switch to another tab?

Yes. The timer calculates elapsed time based on absolute timestamps rather than ticking intervals, meaning timekeeping remains exact even if the tab is inactive.

Can I record lap times and split times?

Yes. Press the 'Lap' button while the stopwatch is running to record split and overall elapsed times in an organized log table with 1-click clipboard copying.

Is there an audio alarm when the countdown finishes?

Yes. The countdown timer includes an audible chime and visual flash alert when the timer hits zero.

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Date & Time Tools

Stopwatch Timer

Online stopwatch and countdown timer with lap functionality

Instant Results100% Client-Side Privacy100% Free Utility

Stopwatch

00:00.00

Recorded Laps

0 Laps

No lap times recorded yet.

Start the stopwatch and click 'Record Lap' to record split times.

About Stopwatch Timer

An online high-precision stopwatch and countdown timer with lap tracking, split times, millisecond accuracy, and full-screen view. Perfect for sports training, classroom tests, presentations, productivity sprints, and cooking.

Why Choose Our Stopwatch & Timer

Feature	Smart Toolverse	Others
Millisecond Precision	High-resolution performance.now() browser clock	Drifting setTimeout intervals
Lap Export	Record unlimited laps and export split data to clipboard	Basic lap counter without export
Fullscreen Mode	Distraction-free high-contrast display for stages and gyms	Cluttered viewport crowded by ads
Background Operation	Continues accurate timekeeping even in background tabs	Freezes or pauses when switching tabs

Common Uses & Applications

Time athletic sprints, track Pomodoro study intervals, measure presentation speeches, manage debate rounds, monitor gym rest intervals, and record multiple lap splits.

Frequently Asked Questions

Our stopwatch uses high-resolution browser timestamps (performance.now()), ensuring accuracy down to a single millisecond without drift caused by CPU scheduling.