Frequently Asked Questions

Tap Start and the stopwatch counts up from zero. Tap Lap at any point to record a split without stopping the clock. Tap Stop to pause, Resume to continue, and Reset to clear everything and start over.

Completely free — no sign-up, no downloads, no limits. Use it as many times as you like on any device.

A lap time is the duration of one segment — the time elapsed since your last lap tap. A split (cumulative) is the total elapsed time at that lap point. The table shows both: lap time in the middle column, cumulative split on the right.

Yes. Once you have two or more laps, the lap table automatically marks the fastest lap in green and the slowest lap in red so they're easy to spot at a glance.

The display shows centiseconds (hundredths of a second). Timing is based on performance.now() timestamp anchors rather than accumulated tick counts, so it stays accurate over long sessions.

Yes. Because the stopwatch measures elapsed time from a start timestamp rather than counting animation frames, it doesn't drift when the browser throttles background tabs. The displayed time catches up the moment you return to the tab.

On browsers that support the Screen Wake Lock API (Chrome, Edge, and others), the stopwatch requests a wake lock when you tap Start to prevent the display from turning off. A small badge confirms when the wake lock is active. It degrades gracefully on unsupported browsers.

Yes. Tap Reset at any time to zero the elapsed time and clear all recorded laps. The stopwatch returns to its initial state, ready for a fresh run.

No. The stopwatch runs entirely in your browser. Nothing is stored, logged, or sent to a server. Close the tab and all lap data is gone.

Yes. It's fully responsive with a large readable display and large tap targets for Start and Lap buttons. It works on phones, tablets, and desktops without any installation.