Online Stopwatch
Measure elapsed time, record lap splits, and download CSV. Choose stopwatch display precision. Records stay in your browser.
Compare the time spent on each stage
Start measures elapsed time. Each lap records both the split since the last lap and the total elapsed time. Use it to compare exercise intervals, presentation practice or steps in a task. Your paused records remain in the same browser.
Space starts or pauses; L records a lap. Shortcuts are disabled while typing or using a dialog. Download CSV to work with records in a spreadsheet. Precision changes displayed decimal places and does not certify laboratory measurement accuracy.
Frequently asked questions
Keep this page open for alarms, timers and focus notifications. Sleep mode, background restrictions and muted devices can delay or silence an alert. Use Test sound first. Stopwatch shortcuts: Space to start or pause, L for a lap. Timer links share a duration or a target date; they do not share your private records.
Time is based on your device clock. It is not independently synchronized to an official time server.