How to Set an Alarm on Your Laptop (Windows 11 & Mac)

Quick answer: yes, your laptop has a built-in alarm clock. On Windows 11, open the Clock app and use the Alarm tab; on a Mac (macOS Ventura or later), open the Clock app and click Alarms. The catch on both platforms is the same: an alarm won't reliably ring if the laptop is asleep or shut down — so below we also cover the power settings that make laptop alarms actually go off.

A quick note if you're coming from an older guide: the classic "ask Cortana to set an alarm" trick is gone — Microsoft retired Cortana in 2023, and its replacement, Copilot, can't set alarms. The Clock app is now the way to do it on Windows.

How to set an alarm on a Windows 11 laptop

Windows 11 ships with the Clock app (formerly "Alarms & Clock"), which handles alarms, timers, a stopwatch, world clocks, and focus sessions.

1. Press the Windows key, type Clock, and open the app.
2. Select Alarm in the left sidebar.
3. Click the + (Add an alarm) button.
4. Set the time, give the alarm a name, and pick which days it should repeat.
5. Choose an alarm sound and a snooze interval (or turn snooze off), then click Save.

Each alarm has an on/off toggle in the list, so you can keep a weekday alarm saved and just switch it on when needed. Alarms still ring when the Clock app is closed and even on the lock screen — with one big exception, covered next.

The same app's Timer tab is often more useful day to day: quick presets plus custom countdowns, handy for cooking, breaks, or timeboxing. The Focus sessions tab adds Pomodoro-style work timers with Microsoft To Do and Spotify integration.

Will the alarm ring if my laptop is asleep?

This is the part most guides skip, and it's why laptop alarms have a bad reputation. The Clock app itself warns: "Notifications will only show if the PC is awake."

• Shut down or hibernated: the alarm will not ring. Period. No app can power on a laptop that's fully off.
• Asleep: it depends on your hardware. Newer laptops with Modern Standby can wake briefly for alarms; older laptops using traditional S3 sleep usually can't unless wake timers are enabled — and even then it's hit-or-miss.

Two ways to make alarms reliable:

Option 1 — stop the laptop from sleeping (Microsoft's recommended fix). Go to Settings > System > Power & battery > Screen and sleep and set sleep to Never (at least for "when plugged in"). Keep the laptop on power overnight.

Option 2 — allow wake timers. Open Control Panel > Power Options > Change plan settings > Change advanced power settings > Sleep > Allow wake timers and set it to Enable. You can check whether anything is scheduled to wake your PC by running powercfg /waketimers in an administrator terminal, and powercfg /a shows which sleep states your hardware supports. On Modern Standby machines this setting is often hidden — another reason Option 1 is the safer bet.

Either way, leave the volume up and do a test alarm two minutes out before trusting your laptop with anything important.

Power-user option: Task Scheduler as an alarm

Task Scheduler can wake a sleeping PC and launch any program — the classic trick is making it play music through VLC:

1. Open Task Scheduler, click Action > Create Task, and name it.
2. Under Triggers, click New and set a schedule (daily at 6:30 a.m., say).
3. Under Actions, click New > Start a program. Point it at VLC (C:\Program Files\VideoLAN\VLC\vlc.exe) and put the path to an MP3 file in the arguments box.
4. Under Conditions, tick "Wake the computer to run this task" (requires wake timers enabled, as above).

Honest caveat: on many modern laptops the machine wakes and runs the task, but the sound doesn't play until you get past the lock screen if sign-in requires a password. It worked better in the pre-Modern-Standby era; treat it as a fun power-user project rather than a dependable wake-up call.

How to set an alarm on a Mac laptop

Good news if you last checked years ago: Macs now have a real alarm clock. Apple added the Clock app to macOS in Ventura (2022), so every supported Mac in 2026 has native alarms — no more Calendar-event workarounds.

1. Open the Clock app (Spotlight: press ⌘ + Space, type Clock).
2. Click Alarms at the top of the window.
3. Click the + button and set the time.
4. Choose repeat days, a label, a sound, and whether snooze is on, then click Save.

You can also just ask Siri — "Set an alarm for 7 a.m." — and it creates the alarm in the Clock app.

The sleep caveat applies here too: Apple doesn't guarantee alarms will ring while a Mac is asleep, and in practice a sleeping or closed MacBook often only shows the alert after you wake it. If you need the alarm to actually sound, keep the lid open with the volume up, and stop the Mac from sleeping: System Settings > Battery > Options > "Prevent automatic sleeping on power adapter when the display is off" (laptop plugged in).

Third-party and web-based alarm clocks

The built-in Clock apps cover most needs, but two other routes are worth knowing:

• Free Alarm Clock (Comfort Software, free from freealarmapp.com or the Microsoft Store) — its headline feature is waking the PC from sleep for an alarm, and it can use any MP3 as the sound. It still depends on wake timers working on your hardware, but it's the strongest third-party option for the sleep problem. Alarm Clock HD on the Microsoft Store is a decent freemium alternative.
• Web alarms like vclock.com or onlineclock.net — nothing to install, work on any OS, fine for a quick timer while you're at the desk. Just know a browser tab can't wake a sleeping laptop: the page only rings while the computer is awake with the tab open.

If you used this guide's old recommendation "Music Alarm Clock" from the Microsoft Store: it hasn't been meaningfully updated since the Windows 8 era, and we no longer suggest it.

Should you rely on a laptop alarm to wake up?

For anything that really matters — catching a flight, medication, your actual morning alarm — a phone is the better tool. Phones are engineered to fire alarms from deep sleep on battery; laptops are not, and lid-closed behavior is inconsistent on both Windows and macOS.

Where laptop alarms shine is while you're using the laptop: meeting nudges, Pomodoro work sessions, cooking timers, and a backup alarm alongside your phone. If you do want to trust one overnight, run through this checklist:

• Plugged in, lid open, volume up
• Sleep set to Never (or wake timers enabled and verified with powercfg /waketimers)
• Alarm toggled on with the right AM/PM
• One successful test alarm before the night you need it

One more gotcha: an alarm is only as accurate as the system clock. If your laptop's time drifts or shows the wrong hour, fix that first — see our guide on what to do when your laptop's time is wrong.

Frequently asked questions

Can I set an alarm on my laptop without installing anything? Yes. Windows 11's built-in Clock app and macOS's built-in Clock app (Ventura and later) both include full alarm features, and web-based alarms like vclock.com work in any browser with zero installs.

Will the alarm go off if my laptop is closed? Usually not. A closed lid normally puts the laptop to sleep, and neither Windows nor macOS guarantees alarms will ring from sleep. Keep the lid open and prevent sleep, or use a phone for must-not-miss alarms.

Will an alarm work if my laptop is shut down? No. No alarm app on Windows or macOS can power on a computer that's fully shut down or hibernated. The laptop must be on — awake, or in a sleep state your hardware can wake from.

What happened to setting alarms with Cortana? Microsoft retired Cortana in 2023. Its successor, Copilot, is a chat assistant and can't set system alarms — use the Clock app instead. On a Mac, Siri can still set alarms by voice.

Can I use my laptop as an alarm clock overnight? Yes, if you prepare it: plug it in, disable sleep (or enable wake timers), leave the volume up, and test it once. A free tool like Free Alarm Clock adds wake-from-sleep support on compatible hardware.

The final verdict

Setting an alarm on a laptop is easy in 2026 — both Windows 11 and macOS ship a proper Clock app, and it takes about thirty seconds. Making that alarm ring when you need it is the real trick: keep the machine awake and powered, test it once, and reach for your phone when missing the alarm isn't an option.

While you're tuning things up, make sure the clock itself is right with our fix for a laptop showing the wrong time, and if your machine takes ages to come back from sleep or boot, see how to fix a slow laptop boot.