Online Stopwatch and Timer
A precise stopwatch with lap recording, and a countdown timer with an alert when it reaches zero.
How to use the Online Stopwatch and Timer
- Choose stopwatch or countdown timer.
- Start it, and record laps as you go if you are using the stopwatch.
- Reset when you are done.
About the Online Stopwatch and Timer
Lap timing is what separates a stopwatch from a clock — recording splits without stopping the count is the whole point for training sets, cooking stages and timed practice. The timing is driven by the system clock rather than a counting loop, so it stays accurate even if the tab is backgrounded. Keep the tab open for the countdown alert to sound.
Frequently asked questions
Can I record lap times?
Yes, laps are recorded without stopping the running count.
Will the timer keep running in a background tab?
Timing stays accurate because it is based on the system clock, but leave the tab open for the alert to sound.
Do I need to install anything?
No. It runs in the browser on phone and desktop.
Does it keep a lap counter?
Yes. Press lap while it runs and each split is recorded with its own time, so the lap counter builds a list you can read back afterwards. The stopwatch keeps running accurately even if the tab is in the background.
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Runs entirely in your browser — nothing you enter is uploaded. Last reviewed and updated .