Multiple alarms with repeat days
Set up to 20 alarms, each with its own label, sound and snooze length. Repeat on weekdays, weekends, every day or any custom mix of days.
Free · No app · No sign-up
Free Online Alarm Clock with Snooze & Custom Sounds
Set an alarm online in two clicks. This free online alarm clock supports multiple alarms, repeat days, snooze and a gentle fade-in wake, and it keeps your screen awake so the alarm actually goes off.
- Multiple alarms
- Snooze & repeat days
- Gentle fade-in wake
- Works offline once loaded
Current time
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No alarm set
Keep screen awake
Your alarms
0 onNo alarms yet. Set one, or tap a quick option below.
Quick alarm in…
Popular wake-up times
Going to bed now? Wake up at
Based on 90-minute sleep cycles plus about 15 minutes to fall asleep. Try the sleep calculator for more options.
Keep this tab open with your volume up. Shortcuts: Enter set alarm · Esc stop · S snooze
7:00 AM
Alarm
Esc stop · S snooze
Why it’s better
An online alarm clock that actually wakes you up
Most browser alarm clocks let you set one alarm, play one harsh beep and hope your laptop stays awake. This one is built to be reliable and pleasant to wake up to.
On time, even in a background tab
Timing runs in a background worker and is checked against your system clock, so alarms fire on the second even when the tab is hidden. A screen-awake switch stops your display from sleeping.
Six sounds, soft to very loud
From gentle chimes and a warm sunrise tone to a classic beep and a siren for heavy sleepers. Sounds are generated in your browser, so they work offline and never fail to load.
Gentle wake with fade-in
Instead of a jolt, the alarm starts quietly and rises to full volume over 30 seconds. It is a calmer way to wake, and it still gets loud if you sleep through the start.
Can’t-ignore-it mode
Turn on “Solve a sum to turn it off” and you will need to answer a quick addition before the alarm stops. By then you are awake enough not to fall back asleep.
Sleep-cycle wake-up times
Going to bed now? One tap sets an alarm at the end of a 90-minute sleep cycle, when waking up feels easiest. Quick buttons set a nap or reminder alarm in seconds.
| Feature | This alarm clock | Typical online alarm |
|---|---|---|
| Several alarms at once | Up to 20 | Usually one at a time |
| Repeat on chosen days | Yes | Rarely |
| Gradual fade-in volume | Yes | No |
| Keep screen awake | Yes | Rarely |
| Background-tab accurate timing | Yes | Not guaranteed |
| Sum-to-dismiss for heavy sleepers | Yes | No |
| Sleep-cycle suggestions | Yes | No |
How it works
How to set an alarm online
It takes about ten seconds, and your alarms are remembered next time you open the page.
Pick the time
Enter the time you want to wake up, or tap a popular time, a quick “in 30 minutes” button or a sleep-cycle suggestion.
Choose a sound
Select a sound, press the speaker to test it, and set the volume. Add a label so you know what the alarm is for.
Set repeat and snooze
Leave Repeat empty for a one-time alarm, or pick days. Choose a snooze length and turn on gentle wake or the sum challenge.
Press Set alarm
Keep this tab open with your volume up. When it rings, press Stop or Snooze, or use Esc and S.
Use cases
What people use an online alarm for
A browser alarm is handy whenever you are already at your computer or your phone is in another room.
Morning wake-up
Use your laptop or tablet as a bedside clock with a soft sunrise sound and a big full-screen display.
Power naps
Tap 20 or 30 minutes for a short nap that keeps you out of deep sleep, so you wake up refreshed instead of groggy.
Meetings and calls
Set labelled alarms a few minutes before each call so you never lose track of time while deep in work.
Medicine reminders
Create repeating daily alarms with labels like “Evening tablets” for doses that need to be taken on time.
Study sessions
Block out revision time with an alarm for the end of each session and a short break in between.
Cooking and chores
Quick alarms in 5, 10 or 15 minutes are perfect for laundry, baking or anything you might forget about.
Reliability checklist
How to make sure your online alarm goes off
A browser can only ring while it is running. Follow these steps for important alarms.
On a computer
- Keep this tab open. You can switch tabs or minimise the window, but do not close it.
- Turn the system volume up and make sure the tab is not muted.
- Plug in your laptop and do not close the lid. Sleep mode pauses the browser.
- Turn on Keep screen awake and set your computer’s sleep setting to “Never” for the night.
On a phone or tablet
- Leave this page on screen with Keep screen awake turned on and the device charging.
- Mobile browsers pause pages that are in the background or behind the lock screen.
- Press the test button once so the browser allows sound, then check the volume.
- For flights, exams and other can’t-miss events, set a backup alarm in your phone’s clock app too.
Sleep smarter
What time should I set my alarm?
Sleep runs in cycles of roughly 90 minutes. Waking at the end of a cycle usually feels easier than waking in the middle of deep sleep. Assuming about 15 minutes to fall asleep, these alarm times line up with full cycles.
| If you go to bed at | 6 h sleep (4 cycles) | 7.5 h sleep (5 cycles) | 9 h sleep (6 cycles) |
|---|---|---|---|
| 9:30 PM | 3:45 AM | 5:15 AM | 6:45 AM |
| 10:00 PM | 4:15 AM | 5:45 AM | 7:15 AM |
| 10:30 PM | 4:45 AM | 6:15 AM | 7:45 AM |
| 11:00 PM | 5:15 AM | 6:45 AM | 8:15 AM |
| 11:30 PM | 5:45 AM | 7:15 AM | 8:45 AM |
| 12:00 AM | 6:15 AM | 7:45 AM | 9:15 AM |
FAQ
Online alarm clock: frequently asked questions
Will the alarm ring if I close the tab?
No. A web page can only play sound while it is open, so keep this tab open until the alarm rings. You can switch to other tabs or minimise the browser. Your alarms are saved, so if you close the tab by mistake, reopen the page and they will be restored.
Does it work when my computer goes to sleep?
No. Sleep mode pauses the whole browser. Plug in your laptop, keep the lid open, set sleep to “Never” and turn on Keep screen awake. If the device slept through an alarm, the page tells you which alarm was missed when it wakes up.
Can I set more than one alarm?
Yes. You can set up to 20 alarms, each with its own time, label, sound, snooze length and repeat days. Use the switch next to an alarm to turn it on or off without deleting it.
How do I set an alarm for 30 minutes from now?
Tap “30 min” under Quick alarm. The alarm is set for exactly 30 minutes from the moment you tap, using the sound and options currently selected in the form.
Why didn’t my alarm make a sound?
Browsers block sound until you interact with a page. Setting an alarm or pressing the test button unlocks it. If you reload the page, tap anywhere once to re-arm the sound. Also check that your volume is up and the tab is not muted.
Does the online alarm clock work on iPhone and Android?
Yes, as long as the page stays open on screen. Turn on Keep screen awake and keep the phone charging. Mobile browsers pause pages in the background or behind the lock screen, so use your phone’s built-in clock app for alarms you cannot afford to miss.
Is it loud enough for heavy sleepers?
Choose the Siren or Digital watch sound, turn off Gentle wake, set volume to 100% and use external speakers if you can. Turning on the sum challenge also stops you from switching the alarm off half asleep.
Are my alarms saved and private?
Yes. Alarms are stored only in your browser on this device and are never sent to our server. They reappear when you come back to this page in the same browser.
Never oversleep again
Set a free online alarm in seconds, with gentle sounds, snooze and repeat days. No app to install and nothing to sign up for.
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