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Set alarms directly in your web browser with this free online alarm clock. Choose from 10 unique ringtones including classic bells, digital beeps, gentle chimes, and more. Adjust the ring duration from 30 seconds to 10 minutes, or set a custom duration. Supports both 12-hour and 24-hour format with a quick "Now" button to set the current time. No download or installation needed — works on any computer, tablet, or phone with a modern browser.
No—the alarm requires the browser tab to remain open. You can switch to other tabs or minimize the window, and the alarm will still fire thanks to background timing. However, completely closing the tab will cancel the alarm.
Click the sound settings button (speaker icon) in the toolbar to choose from 20 alarm sounds, including gentle chimes, classic bells, xylophone, morning birds, and louder options like fire alarm, buzzer, and air horn. You can preview each sound before setting your alarm.
This alarm clock supports one alarm at a time. If you need multiple simultaneous alarms, try the Multiple Timers tool, which lets you run several independent countdown timers at once.
Yes. The alarm works on any device with a modern web browser—phones, tablets, laptops, and desktops. For the best experience on mobile, keep the browser tab open and your phone's volume turned up. No app download is required.
Yes, completely free with no sign-up required. All 20 alarm sounds, custom ring durations, 12/24-hour format, fullscreen mode, and customizable themes are included at no cost.