Does it play a sound when the timer ends?

Yes. When the countdown reaches zero a short audible alert plays (subject to browser audio permission).

Does it stay accurate while the tab is in the background?

Time is computed from the real clock, so it shows the correct value when you return to the tab. The sound alert may require the tab to be active.

Do I need to install anything?

No. The tool runs directly in your browser — no app or download required.

Online Stopwatch & Timer

A precise stopwatch and countdown timer that runs in your browser. Record laps on the stopwatch; get an audible alert when the timer runs out.

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About

This tool works in two modes: the stopwatch counts up (and lets you record laps), while the timer counts down from a duration you set and plays a sound when it reaches zero.

It is useful any time you need to track time — workouts, study sessions (pomodoro), cooking, exams or rehearsing a talk. No install is needed; it runs entirely in your browser, even offline.

How to use

Choose the Stopwatch or Timer tab.
On the stopwatch, press Start and record Laps if needed.
On the timer, enter minutes/seconds and press Start; an alert sounds when time is up.

Example uses

Pomodoro: Set the timer to 25 minutes and focus; an alert sounds when time is up.
Workout / HIIT: Track rest between sets with the countdown and total time with the stopwatch.
Cooking: Enter minutes/seconds and use it as a kitchen timer.
Lap recording: On the stopwatch, record running laps or segment times separately.

Frequently Asked Questions

Does it play a sound when the timer ends?: Yes. When the countdown reaches zero a short audible alert plays (subject to browser audio permission).
Does it stay accurate while the tab is in the background?: Time is computed from the real clock, so it shows the correct value when you return to the tab. The sound alert may require the tab to be active.
Do I need to install anything?: No. The tool runs directly in your browser — no app or download required.

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Embed this tool

Copy the code below and paste it into your site's HTML to embed this tool for free. The snippet includes an attribution link back to the source.

<iframe src="https://tooldict.com/embed/en/stopwatch-timer" title="Stopwatch & Timer" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:16px;max-width:680px" loading="lazy"></iframe>
<p style="font:13px/1.5 sans-serif">Powered by <a href="https://tooldict.com/en/stopwatch-timer" target="_blank" rel="noopener">Stopwatch & Timer</a> — Tooldict</p>