What does this tool do?
The Stopwatch & Timer combines a stopwatch and a countdown timer that run right in your browser. The stopwatch records laps, while the timer alerts you when the time you set runs out. No installation or app download is required.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
How it works
In stopwatch mode, start, stop and reset buttons measure elapsed time to millisecond precision, and the lap button adds the current split to a list on each press. In timer mode you enter hours, minutes and seconds, and an audible/visual alert fires when the countdown reaches zero.
Common use cases
The stopwatch is ideal for timing workout sets, running laps or how long a task takes. The countdown timer is used for Pomodoro focus sessions, tracking cooking time in the kitchen or keeping your presentation speech within its limit.
Frequently asked questions
What exactly does the lap feature do?
Each time you press the lap button, the elapsed time up to that moment is saved as a separate row while the stopwatch keeps running. This lets you compare the split of each lap and the total time side by side.
Will I lose my time if I close or refresh the tab?
Yes, because the timer runs entirely in the browser tab, refreshing or closing the page resets the current time. You need to keep the tab open to continue timing.
Is Stopwatch & Timer free?
Yes. Stopwatch & Timer and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Stopwatch & Timer works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.