A countdown timer and a stopwatch with laps. 1/3/25-minute presets, an end chime, and the remaining time in the tab title so you can watch it from another tab.

How to use it

1. Enter hours/minutes/seconds, or use a preset (1 · 3 · 5 · 10 · 25 min)
2. Start — the remaining time also shows in the tab title
3. It chimes three times when the time is up
4. Use the Stopwatch tab for laps, and copy them

Common questions

Is it accurate while I am looking at another tab?

Yes. Instead of counting frames it takes the difference between the start time and now, so error does not pile up even when the browser slows a background tab down.

I get no sound.

Browsers block sound until the page has been clicked at least once. If you started it with the Start button it will ring normally. Check that the device is not muted too.

Will it alert me if I close the window?

No — the tab has to stay open. If you need an alarm that wakes a sleeping computer, use the Alarm tool in the KarmoLab desktop app.

Other tools

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