No app install, no account — just pick a time, keep the tab open, and get a chime plus a notification when it’s time.
What Is the Alarm Clock?
A browser-based alarm that lets you set a specific wall-clock time (with an optional label), then rings using the Web Audio API and fires a browser notification if you’ve granted permission — all tracked against a live-updating current-time display.
How to Use It
- Open the tool at /tools/alarm-clock.
- Pick a time and optionally a label.
- Click Set alarm, then keep the tab open until it rings.
Key Features
- Live current-time display updating every second, so you always know exactly what the browser sees as “now.”
- Automatic next-day scheduling if the chosen time has already passed today.
- Optional browser notifications, in addition to the built-in audible chime.
- Fully client-side, nothing ever leaves your browser.
When to Use This Tool
- Quick one-off reminders without installing a separate alarm app.
- Timed breaks during focused work sessions, paired with a specific clock time rather than a countdown.
- Testing notification and audio behavior in a browser-based workflow.
Try It Now
Open Alarm Clock directly, or press ⌘K and type the tool name from anywhere on the site.
Part of the Productivity collection on WebdevToolbox — free, browser-based developer tools with no login required.