Question 1

Does the online alarm clock work offline?

Accepted Answer

Yes! Once the page is loaded, alarms are synthesized using the Web Audio API and work even if your WiFi drops.

Question 2

Will the alarm ring if I close the browser tab?

Accepted Answer

No. Keep the tab open and your screen on. The alarm runs in the browser tab so it needs to remain active.

Question 3

Can I run the countdown timer in full screen?

Accepted Answer

Yes. Click the expand icon in the top right corner of the timer section to enter full-screen mode on any monitor or projector.

Question 4

Is the stopwatch accurate over long durations?

Accepted Answer

Yes. The stopwatch uses requestAnimationFrame against the system timestamp rather than counting intervals, ensuring zero drift over any duration.

Question 5

How do I convert time between time zones?

Accepted Answer

Go to the Time Zone Converter tool, enter your time, select your source and target time zones, and click Convert. The tool automatically handles Daylight Saving Time rules.

Question 6

How is my exact age calculated?

Accepted Answer

Enter your date of birth and an optional target date. The calculator breaks down your age into exact years, months, and days accounting for leap years and varying month lengths.

Question 7

Can the hours calculator handle overnight shifts?

Accepted Answer

Yes. If your end time is earlier than your start time, the calculator automatically adds 24 hours to correctly calculate overnight or midnight-crossing shifts.

Question 8

How many cities can I add to the world clock?

Accepted Answer

You can add any city or time zone from the full IANA timezone database &mdash; over 400 locations worldwide. Search by city name or region in the input field.

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