Countdown timer
Free online countdown timer with an alarm sound and notification. Set hours, minutes and seconds or pick a preset such as 5 or 25 minutes.
Online stopwatch with laps
Measure how long something takes, to the hundredth of a second. Split laps to compare rounds: Toolbox marks the fastest and the slowest one.
Runs in your browser. Nothing is uploaded.
Loading the stopwatch…
How to use the stopwatch
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Select Start to begin timing.
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Select Lap to split the time; every lap appears in the table with its own duration.
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Select Stop to pause, then Start to continue or Reset to clear the laps.
Frequently asked questions
Does the stopwatch keep running in a background tab?
Yes. The stopwatch measures the time that passed since you started it, so the result stays exact even when your browser slows down timers in a background tab.
How are the fastest and slowest laps marked?
With at least two laps, the fastest lap is labelled "Fastest" and the slowest lap "Slowest", so you do not need to tell them apart by color.
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