Free Online Alarm Clock
Set an alarm quickly and easily. Choose your alarm time, pick a sound, and let your browser wake you up. No app install required.
How to Set an Alarm with This Online Alarm Clock
If you've ever needed a quick way to set an alarm without installing anything, you're in the right place. Alarm Click is a free online alarm clock that runs right in your browser. Just pick a time, choose one of ten sounds, and hit Set Alarm — that's it. Your browser handles the rest and plays the sound when the clock alarm goes off.
You can test any sound before committing, adjust the volume in settings, and use the snooze button if you need a few more minutes. There's also a Lights Off mode that blacks out the screen — handy when you're sleeping with your phone nearby and don't want the glow. Your last alarm set is saved locally so you don't have to re-enter it every morning.
Why Use an Online Alarm Clock?
Not everyone wants to download yet another app just to wake up on time. This alarm clock website works on any device with a browser — phone, laptop, tablet, whatever you've got. No account, no sign-up, no permissions to grant. Open the page, set an alarm, and you're done. It's an online alarm that respects your time and your privacy.
The online clock at the top always shows your exact local time, so you know your alarm is synced correctly. Whether you need a wake-up call at 6 AM or a reminder for a meeting at 3:30 PM, this alarm clock has you covered. And since everything runs locally, it works even with a slow connection — all you need is the tab open.
Alarm Clock vs. Timer — Which One Do You Need?
Here's the simple difference: an alarm clock goes off at a specific time on the clock (like 7:00 AM), while an online timer counts down from a duration you set (like 25 minutes). If you're thinking "wake me up at 8" — that's an alarm. If you're thinking "remind me in 10 minutes" — that's a timer.
Use this page to set alarm times for waking up, appointments, or any moment you don't want to miss. For study sessions, cooking, or workouts where you need a break timer or an exact timer, the timer page is what you want. You can also track elapsed time with the online stopwatch if you need to measure how long something takes.
Making sure the alarm actually rings
A browser alarm is only as reliable as the device it runs on, so a few settings matter more than anything else. First, keep the tab open. The alarm is scheduled inside the page; if the tab is closed the timer is gone. Minimising the browser or switching to another tab is fine on a laptop. On a phone, keep the browser in the foreground and the screen unlocked, or use the Lights Off mode, which dims the page to near-black so it can sit on your nightstand without lighting up the room.
Second, check the volume path. On iPhones the ringer switch and the media volume are separate; the alarm plays through the media channel, so the phone can be on silent and still ring as long as media volume is up. Android phones follow the media volume slider too. Use the Test button next to the sound picker before you go to sleep: if you hear the tone now, you will hear it at 6:30.
Third, disable aggressive battery savers for the browser if you rely on the alarm overnight. Some Android manufacturers suspend background tabs after a few minutes. Plugging the phone in usually prevents this, and it also keeps the screen from timing out while Lights Off is active.
Choosing an alarm time that works with your sleep
Sleep runs in cycles of roughly 90 minutes, moving from light sleep into deep sleep and back out through REM. Waking at the end of a cycle, when sleep is light, feels dramatically easier than being pulled out of deep sleep halfway through. If you usually fall asleep around 23:15, cycles end near 00:45, 02:15, 03:45, 05:15, 06:45 and 08:15, so an alarm at 06:45 tends to feel gentler than one at 06:00 even though it is later.
Two habits make this easier. Give yourself a consistent wake time seven days a week; the body's clock keys on when you get up, and a stable anchor makes falling asleep easier. And put the alarm far enough away that you have to stand up to stop it. Standing up ends the "just five more minutes" loop that the snooze button invites. Our guide to waking up on time goes deeper into light exposure, caffeine timing and what to do when you keep sleeping through alarms.
Sounds, snooze and repeat
The fifteen alarm tones are not audio files; they are generated live with the Web Audio API, which is why the page loads in a fraction of a second even on a slow connection. They fall into three groups. Gentle sounds (Gentle Chime, Morning Birds, Harp Gliss, Water Cascade) ramp up slowly and suit early risers who wake easily. Standard tones (Classic Beep, Digital Tone, Melody Rise, Xylophone, Marimba, Doorbell) are what most people expect from an alarm clock. Insistent sounds (Urgent Alert, Soft Siren, Radar Pulse, Church Bell, Double Ring) are for heavy sleepers; combine one of them with Loop Sound switched on so the tone repeats until you press Stop.
Snooze defaults to five minutes and can be set to 1, 3, 5, 10 or 15. Sleep researchers generally recommend either skipping snooze altogether or keeping it to a single short delay, because repeatedly drifting back into light sleep for five-minute stretches leaves you groggier than getting up at the first ring. The alarm remembers your last time, sound and snooze settings on this device, so the next evening you only need to open the page and press Set Alarm.
Alarm clock, timer or nap timer?
Use this page when you care about a time on the clock: wake up at 7:00, leave for the train at 8:12, join a call at 15:30. Use the online timer when you care about a duration: 25 minutes of focused work, 11 minutes for pasta. For a short daytime sleep the nap timer is a better fit than either; it has presets for a 20-minute power nap and a full 90-minute cycle and it wakes you with a soft fade-in rather than a jolt. If you need several reminders in a row, for example every hour, set the interval timer instead of re-arming an alarm.
Popular Alarm Clock Uses
Morning Wake-Up
Set a browser alarm as a backup to your phone alarm. Great for heavy sleepers who need a second device ringing.
Nap Timer
Set an alarm for 20 or 30 minutes from now to take a power nap without oversleeping.
Meeting Reminders
Working at your computer? Set an alarm 5 minutes before your next meeting so you're never late.
Frequently Asked Questions
How does the online alarm clock work?
Set your desired alarm time and choose a sound. Keep this browser tab open, and the alarm will ring at the set time using your device's audio. If you need to time a shorter task instead, try the online timer.
Do I need to download anything?
No. Alarm Click works entirely in your browser. No downloads, installs, or sign-ups needed. All tools — including the stopwatch, timer, and world clock — run directly in your browser.
Will the alarm work if I close the tab?
The alarm requires the browser tab to stay open. Closing the tab will cancel the alarm. For date-based events, consider using the countdown tool to track time remaining.
Can I set multiple alarms?
Currently you can set one alarm at a time. Multiple alarm support is planned for a future update. In the meantime, you can use the timer alongside the alarm for a second timed reminder.
Does the alarm work on mobile?
Yes, the alarm works on mobile browsers. Make sure your phone is not in silent mode and the browser tab stays active.
What is the difference between the alarm and the timer?
The alarm triggers at a specific clock time (e.g., 7:00 AM), while the timer counts down from a duration you set (e.g., 10 minutes). Use the alarm to wake up or remember appointments, and the timer for cooking, studying, or workouts.