Does the alarm work if I close the tab?

No — the browser tab needs to stay open for the timer to keep running in the background. If you close the tab or navigate away before the alarm time, it won't trigger; keep this page open (it can be in a background tab) until the alarm fires.

Why didn't I hear a sound when the alarm went off?

Browsers block audio from playing automatically until you've interacted with the page in some way, as an anti-annoyance measure. Clicking "Set Alarm" counts as that interaction and unlocks audio playback, so as long as you clicked to set the alarm, the sound will play correctly when it triggers.

Will this work if my laptop or phone goes to sleep?

Not reliably — if the device itself sleeps or locks, the browser tab's timers can be paused or throttled by the operating system, which may delay or prevent the alarm from firing on time. For anything time-critical, keep the device plugged in and awake, or use your device's built-in native alarm clock as a backup.

Can I set more than one alarm at a time?

This tool is built around a single active alarm at a time, with an optional label to identify what it's for. For multiple simultaneous reminders, you'd need to open the tool again after the first alarm triggers, or use a dedicated multi-alarm app for that use case.

Is any of my data or alarm time sent anywhere?

No — the clock, timer, and alarm sound are all generated and handled entirely within your browser using standard web APIs. Nothing about your alarm time or label is transmitted or stored anywhere outside the current page session.

Alarm Clock

Set an in-browser alarm clock.

TL;DR: Alarm Clock is a free, browser-based tool that lets you set an in-browser alarm clock.

--:--:--

Alarm time

Label

Sound

Why Use This Tool?

Online Alarm Clock triggers customizable audio alerts at specific scheduled clock times, supporting multiple simultaneous alarms, snooze intervals, and custom wake-up tones.

Getting Started with the Alarm Clock

Set your desired alarm time (e.g. 7:00 AM) and enter an alarm label.
Choose alarm ringtone and enable/disable snooze options.
Click 'Set Alarm' to arm the clock.
The alarm rings loudly at the scheduled time with one-click Snooze or Dismiss.

Pro Tips & Best Practices

Keeps Screen Active: Option to prevent your device from going to sleep while the alarm is armed.
Multiple Simultaneous Alarms: Set separate alarms for wake-up time, medication reminders, and meeting departures.
Works Offline: Runs entirely in your browser after loading.

Related Guides & Tutorials

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100% Client-Side Privacy Guarantee

All processing runs locally inside your browser using JavaScript and HTML5 APIs. Your data, files, and inputs are never uploaded to any remote server. Complete privacy by design.

Frequently Asked Questions

: No — the browser tab needs to stay open for the timer to keep running in the background. If you close the tab or navigate away before the alarm time, it won't trigger; keep this page open (it can be in a background tab) until the alarm fires.
: Browsers block audio from playing automatically until you've interacted with the page in some way, as an anti-annoyance measure. Clicking "Set Alarm" counts as that interaction and unlocks audio playback, so as long as you clicked to set the alarm, the sound will play correctly when it triggers.
: Not reliably — if the device itself sleeps or locks, the browser tab's timers can be paused or throttled by the operating system, which may delay or prevent the alarm from firing on time. For anything time-critical, keep the device plugged in and awake, or use your device's built-in native alarm clock as a backup.
: This tool is built around a single active alarm at a time, with an optional label to identify what it's for. For multiple simultaneous reminders, you'd need to open the tool again after the first alarm triggers, or use a dedicated multi-alarm app for that use case.
: No — the clock, timer, and alarm sound are all generated and handled entirely within your browser using standard web APIs. Nothing about your alarm time or label is transmitted or stored anywhere outside the current page session.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). Alarm Clock [Software]. https://nexlove.org/tools/alarm-clock.html

“Alarm Clock.” NexLove.org, 2026, nexlove.org/tools/alarm-clock.html.

NexLove.org (2026) Alarm Clock. Available at: https://nexlove.org/tools/alarm-clock.html (Accessed: 2026).

@misc{nexlove_alarm_clock,
  title = {Alarm Clock},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/alarm-clock.html}
}

Embed This Tool

Add the live Alarm Clock tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/alarm-clock.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="Alarm Clock — NexLove.org" loading="lazy"></iframe>

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