Online Stopwatch with Lap Timer
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A free online stopwatch with lap timer — no download, no signup. Start, stop, lap, and reset with one click. Lap times are listed with split and cumulative totals; fastest and slowest laps are highlighted automatically. Perfect for running, sports, studying, and interval training.
Three steps. No setup.
Drop your content into the field above, or type directly into it. The tool starts working the moment you do — no button to press.
Everything is calculated locally in your browser as you type. No waiting, no uploading, no server involved.
Hit Copy to grab the result, or Download if the tool offers a file. Close the tab — nothing is stored.
Free, private, and built to last.
Stopwatch is a free online tool that runs entirely in your browser. No data is sent to any server — your input stays private on your device and disappears the moment you close the tab.
It is designed to be fast, simple, and accessible to everyone — whether you are a developer, marketer, student, or business owner. No signup, no ads, no nonsense. Just the tool, ready when you need it.
Frequently Asked Questions
A stopwatch counts up from zero — you start it and it measures how long something takes. A countdown timer counts down from a set time to zero and alerts you when time is up. Use this stopwatch when measuring elapsed time; use a countdown timer when you want an alarm after a fixed duration.
Click Lap while the stopwatch is running to record a split time. The lap is added to the table below with its individual split time and the cumulative total time. The stopwatch keeps running — you do not need to stop it to record a lap. Click Lap as many times as you need.
This stopwatch uses the browser's high-resolution timer API, which is accurate to sub-10 milliseconds. It is accurate enough for training, classroom timing, presentations, and everyday use. It is not suitable for official sports timing where certified hardware is required.
Yes. Click Lap at the end of each interval to record it. After two or more laps, the fastest lap is highlighted in green and the slowest in red — making it easy to track your performance across intervals without writing anything down.
Yes. Once the page has loaded, all timing logic runs entirely in your browser with no server connection needed. The stopwatch continues working correctly even if your internet connection drops after the page loads.