SportsTimeHQ

Online Alarm Clock

Pick the time, choose a sound, press Set alarm. It rings in this tab, at your device’s time, with no app or sign-up.

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Set the alarm time

Your alarms

    Keep this tab open and your computer awake. Alarms are saved, so they come back if you reload the page.

    Pick a wake-up time that lands between sleep cycles

    Most people wake up groggy not because they slept too little, but because the alarm went off in the middle of deep sleep. A night of sleep runs in cycles of roughly 90 minutes (it varies from about 80 to 110 minutes between people), and waking near the end of a cycle usually feels easier than waking in the middle of one.

    Sleep cycle chart: bed at 11 PM, wake-up options at 5:15, 6:45 and 8:15 AM
    Going to bed at 11:00 PM: the end of cycle 5 falls around 6:45 AM. Treat these times as a starting point and adjust by 10–15 minutes until mornings feel easier.
    Wake-up times for a 15-minute “fall asleep” buffer
    In bed at4 cycles (6 h)5 cycles (7.5 h)6 cycles (9 h)
    9:30 PM3:45 AM5:15 AM6:45 AM
    10:00 PM4:15 AM5:45 AM7:15 AM
    10:30 PM4:45 AM6:15 AM7:45 AM
    11:00 PM5:15 AM6:45 AM8:15 AM
    11:30 PM5:45 AM7:15 AM8:45 AM
    12:00 AM6:15 AM7:45 AM9:15 AM

    For a daytime power nap, the usual advice is the opposite: keep it short (about 20 minutes) so you wake up before deep sleep starts. The timer is the quicker tool for that, because you set a duration instead of a clock time.

    How to set the alarm

    1. Check the big clock at the top. That is your device’s time, and the alarm follows it.
    2. Choose the hour and minute, or tap one of the quick picks (5:00 AM to 8:30 AM).
    3. Pick a sound and press Test to hear it at the current volume.
    4. Add a label if you like (“Morning run”, “School pickup”) and press Set alarm.
    5. When it rings, press Stop, or Snooze to hear it again a few minutes later.

    Checklist for a reliable wake-up

    • Keep the laptop plugged in with the lid open. A sleeping computer cannot play sound.
    • Turn the system volume up and press Test once before bed; check that the tab is not muted.
    • While an alarm is active, the page asks supporting browsers to keep the screen on.
    • Open settings (gear icon) to change the snooze length, the volume or the auto-stop time.

    Daylight saving time and your alarm

    The alarm uses your operating system’s clock, so it follows clock changes automatically. In the US, clocks went back on Sunday, November 1, 2026 and go forward again on March 14, 2027. In the UK they went back on October 25, 2026 and go forward on March 28, 2027. If an alarm is set for the night of a change, the 2 AM hour that repeats or is skipped can make the “rings in” countdown look an hour off. The ring time itself stays correct.

    In the Philippines, India and most of Asia there is no daylight saving time at all, so the alarm time never moves.

    Frequently asked questions

    Will the alarm ring if I switch to another tab?

    Yes. The tab only has to stay open, not visible. You can keep working in other tabs or apps.

    Does it work if my computer goes to sleep?

    No. When the computer sleeps or the laptop lid closes, the browser pauses and cannot play sound. Keep the device awake and plugged in.

    Can I set more than one alarm?

    Yes. Every press of Set alarm adds another alarm to the list, each with its own label and sound.

    Do I need an internet connection?

    Only to load the page. Once it is open, the alarm still rings if your Wi-Fi drops.

    Why didn’t I hear anything?

    Browsers block sound until you have interacted with the page. Click anywhere once after opening it, make sure the tab is not muted and test the sound.

    How long should a nap alarm be?

    For a quick refresh, about 20 minutes. A full 90-minute cycle also works, but anything in between often lands in deep sleep and leaves you groggy.

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