Free Online Stopwatch with Lap Times

ScreenTimer’s online stopwatch is precise to the centisecond and works instantly in your browser — no download required. Start, stop, and reset with a single click or press the spacebar. Record unlimited laps with automatic split time and cumulative total tracking.

Lap Recording and Export

Every lap you record shows the split time for that interval alongside the running total. Your fastest lap is highlighted in green and your slowest in red, giving you instant visual feedback during training or competitions. When you are done, copy all lap data to your clipboard or export it as a CSV file for spreadsheets, training journals, or performance analysis.

Browser Tab Display

Enable “Show time in browser tab” in Preferences and the elapsed stopwatch time appears right in your tab title. This means you can work in another tab and still see the stopwatch ticking in your peripheral vision — no context switching required.

Keyboard Shortcuts

Press Space to start or pause, R to reset, L to record a lap, and F to toggle fullscreen. The stopwatch responds instantly to keyboard input, making it ideal for timing events where your hands are busy.

Use Cases

Athletes use it for interval training and race splits. Students use it for timed practice exams. Coaches record multiple athletes’ times with lap functionality. Home cooks time recipes. Professionals track how long tasks actually take for better time estimation. Whatever you need timed, this stopwatch handles it — free, accurate, and always available in your browser.

Stopwatch FAQ

Does the online stopwatch have a lap recording feature?

Yes. Press the Lap button or the L key during a running stopwatch to record unlimited laps. Each lap shows the split time for that interval and the cumulative total. Your fastest lap is highlighted in green and slowest in red.

Can I export my stopwatch lap times to a spreadsheet?

Yes. After recording laps, click the CSV button to download all lap data as a CSV file that opens directly in Excel, Google Sheets, or any spreadsheet application. You can also click Copy to copy lap data to your clipboard.

How accurate is the online stopwatch?

ScreenTimer’s stopwatch uses JavaScript’s high-resolution timing APIs and updates every 16 milliseconds, providing centisecond (1/100th of a second) precision. This is accurate enough for training, education, and general timing purposes but should not replace certified precision instruments for official competitions.

What keyboard shortcuts work with the stopwatch?

Press Space to start or pause, R to reset, L to record a lap, and F to toggle fullscreen mode. These shortcuts let you control the stopwatch without clicking, which is useful when timing events where your hands are busy.