Alarm Clock, Stopwatch & Timer
About Alarm Clock, Stopwatch & Timer
Our free online Alarm Clock, Stopwatch & Timer combines everyday time-tracking tools in one place. Set one or more alarms with custom labels, track elapsed time down to the hundredth of a second with the stopwatch and lap timer, or count down from any duration with the built-in timer - complete with quick presets for 1, 5, 10, 15 and 30 minutes.
World Clock
Drag the hour and minute hands to set a time and toggle AM/PM below, or simply fill in the alarm details underneath and click Add Alarm.
The live clock automatically detects your device's timezone (shown right below it), and a World Clock panel shows the current time in major cities around the world at a glance - handy for scheduling calls or checking time differences without leaving the page.
Everything runs directly in your browser: alarms are saved locally so they are still there the next time you visit, and no sign-up, download or plugin is required. Because it works entirely in your browser tab, keep the tab open (or pinned) for alarms and timers to ring reliably.
Who Uses This Tool
Remote workers use the alarm and world clock together to keep track of meeting times across different offices without switching apps. Students and home cooks use the countdown timer with its quick presets for study sprints, workout intervals or timing something in the oven. Coaches and event organizers use the stopwatch and lap timer to clock drills or race splits on the fly from any laptop or phone browser. Anyone juggling multiple deadlines in a day sets several labeled alarms at once so nothing gets missed, all without installing a dedicated app.
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Frequently asked questions
Will the alarm still ring if I close the browser tab?
No - the alarm relies on the tab staying open in your browser. Keep the tab open (it can be in the background) for the alarm and sound to trigger at the set time.
Can I set more than one alarm?
Yes - anonymous users can save up to 5 alarms; signing up for a free account removes that limit entirely.
Is there a limit to how long the timer or stopwatch can run?
No - the stopwatch and timer can run for as long as you need, from a few seconds up to several hours. Just keep the browser tab open so it keeps counting.
