闹钟、秒表与计时器
关于 闹钟、秒表与计时器
设置闹钟、使用秒表计时、用计时器倒计时，或查看世界时钟--完全免费，直接在浏览器中使用。--:--:--
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.
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No alarms set yet - add one above.
00:00.00
05:00
Related Tools
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.
