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Free Online Alarm Clock — Multiple Alarms, Custom Tones & Live World Clocks
A professional, browser-based alarm clock that works on any device — no app download, no account required. Set unlimited alarms with custom labels, repeating schedules, and 8 synthesized tones, alongside live clocks for 12 global cities.
Multiple Simultaneous Alarms
Set as many alarms as you need, each independently configured with its own time, label, tone, snooze duration, and weekday repeat schedule.
- Individual label per alarm
- Per-alarm snooze configuration
- Enable / disable each alarm independently
- Repeat on any combination of weekdays
- Live countdown to next trigger
8 Distinct Alarm Tones
Choose from eight Web Audio API-synthesized tones — from gentle chimes for light sleepers to strong digital beeps for deep sleepers. All generated natively; no audio files downloaded.
- Beep, Digital, Gentle, Pulse
- Ding, Buzz, Chime, Rise
- Preview any tone before setting alarm
- Zero latency — plays instantly in browser
Live World Clocks
Track the exact local time in 12 major cities across all continents simultaneously, updating every second with local date and UTC offset displayed.
- New York, London, Paris, Dubai
- Mumbai, Singapore, Tokyo, Sydney
- Los Angeles, São Paulo, Cairo, Toronto
- UTC offset badge per city
Smart Snooze System
When an alarm fires, dismiss it immediately or snooze for your pre-configured duration. A snooze alarm is automatically added to your list for full visibility.
- Choose 1, 5, 10, 15, or 30 minutes
- Snooze alarm visible in your list
- One-click dismiss from modal
- Repeating alarms re-arm automatically
Light & Dark Mode
Switch instantly between a warm light palette and a refined dark theme. Both modes offer excellent contrast, comfortable typography, and fully adapted UI components.
- Warm off-white light palette
- Deep terracotta-accented dark palette
- Instant toggle — no page reload needed
- All cards, modals & clocks adapt
Private & Always Free
No account, no registration, no tracking. The alarm clock runs entirely in your browser — nothing is sent to any server. Zero ads, zero interruptions, forever free.
- Zero data collection
- No sign-up or login required
- Works on desktop, tablet & mobile
- Compatible with all modern browsers
Frequently Asked Questions
Yes — modern desktop browsers continue running JavaScript even when a tab is minimized or running in the background. Our alarm clock checks the current time every second regardless of whether the tab is in focus. For the most reliable experience, keep your device volume on and avoid closing the browser entirely. Note that some mobile browsers may suspend background tabs after extended inactivity, so on mobile it is best to keep the tab visible on screen.
Absolutely — there is no limit. Each alarm has its own time, label, tone selection, snooze duration, and optional weekday repeat schedule. All alarms run simultaneously, and each can be toggled on or off individually without being deleted. A live countdown shows how long remains until each enabled alarm fires.
No account or registration is required. The alarm clock is completely free and works instantly in your browser with no installation, no plugins, and no sign-up. Simply open the page, set your alarm, and you are ready to go. All functionality — multiple alarms, custom tones, world clocks, and light/dark mode — is available immediately without providing any personal information.
When an alarm fires, a full-screen modal appears with two options: Dismiss and Snooze. Clicking Snooze silences the current alarm and automatically creates a new one-time alarm set to ring after your chosen snooze duration — 1, 5, 10, 15, or 30 minutes. The snooze alarm appears visibly in your alarm list so you can track or delete it at any time. You configure the snooze duration for each alarm before adding it.
Yes. The clock automatically detects your local time zone from your device's system settings and displays the current local time accordingly. Your detected time zone name and UTC offset are shown beneath the main clock. All alarms are triggered based on your local time. The World Clocks section separately shows the current local time in 12 major cities around the globe, each in its own time zone.
An online alarm clock offers several advantages over a phone. It runs silently in a browser tab, ideal for offices or libraries where phone sounds are disruptive. You can set multiple alarms with detailed labels and repeat schedules in a clear visual interface — often easier than a native phone app. It also keeps your phone free for calls and other notifications, and works perfectly on desktop computers and laptops where you are already working throughout the day.
When setting an alarm you can select any combination of weekdays using the Su / Mo / Tu / We / Th / Fr / Sa buttons. If you select one or more days, the alarm fires every week on those days at the specified time and re-arms automatically after each trigger. If you select no days, the alarm fires once at the next occurrence of that time and then disables itself. You can re-enable it at any time with the toggle switch.
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