# Alarm Clocks

> Free online alarm clock, countdown timer, stopwatch, Pomodoro timer, and sleep cycle calculator. Browser-based, no download, no signup required.

Alarm Clocks (alarmclocks.co) is a suite of free, web-based time tools made by Shape Your Brand LLC. All tools work in any modern browser on desktop and mobile, support fullscreen mode, dark/light themes, and require no installation.

## Core Tools

- [Online Alarm Clock](https://alarmclocks.co/): Set one or multiple alarms with custom labels and ringtones; works in any browser tab.
- [Stopwatch](https://alarmclocks.co/stopwatch-timer): Precision stopwatch with lap times.
- [Pomodoro Timer](https://alarmclocks.co/pomodoro-timer): Configurable work/break Pomodoro cycles with session history.
- [Sleep Calculator](https://alarmclocks.co/sleep-calculator): Calculates optimal bedtime or wake time based on 90-minute sleep cycles.
- [Pomodoro Technique Guide](https://alarmclocks.co/pomodoro-technique): Explanation of the Pomodoro method and how to apply it.
- [Timer Categories](https://alarmclocks.co/timer-categories): Browse all preset countdown timers.

## Popular Countdown Timers

- [1 Minute Timer](https://alarmclocks.co/set-1-minute-timer)
- [5 Minute Timer](https://alarmclocks.co/set-5-minute-timer)
- [10 Minute Timer](https://alarmclocks.co/set-10-minute-timer)
- [15 Minute Timer](https://alarmclocks.co/set-15-minute-timer)
- [20 Minute Timer](https://alarmclocks.co/set-20-minute-timer)
- [25 Minute Timer](https://alarmclocks.co/set-25-minute-timer)
- [30 Minute Timer](https://alarmclocks.co/set-30-minute-timer)
- [45 Minute Timer](https://alarmclocks.co/set-45-minute-timer)
- [60 Minute Timer](https://alarmclocks.co/set-60-minute-timer)
- [1 Hour Timer](https://alarmclocks.co/set-1-hour-timer)
- [2 Hour Timer](https://alarmclocks.co/set-2-hour-timer)
- [8 Hour Timer](https://alarmclocks.co/set-8-hour-timer)

## Frequently Asked

- The alarm and timers are 100% free with no ads or signup.
- Sound continues to play as long as the browser tab is open; some mobile browsers throttle background audio.
- All preference data (alarms, theme) is saved locally per browser; signing in syncs across devices.

## Legal

- [Privacy Policy](https://alarmclocks.co/privacy)
- [Terms of Service](https://alarmclocks.co/terms)