Lull — Free Sleep Sounds, White Noise & Alarm Clock
Lull is a free web app for sleep sounds, white noise, and ambient soundscapes with a built-in alarm clock and sleep timer. Mix high-quality sounds like rain, ocean waves, wind, campfire, and fan noise for better sleep, focus, and study.
Sleep Sounds Available
- White noise — steady, full-spectrum sound that masks background noise
- Pink noise — softer, balanced frequencies like gentle rainfall
- Brown noise — deep, low-frequency rumble for deep sleep
- Rain sounds — calming rain with natural droplet textures
- Ocean waves — rhythmic wave sounds that swell and recede
- Wind sounds — gentle wind that modulates naturally
- Fan noise — steady mechanical hum for sleep
- Campfire sounds — warm crackling fire ambience
Features
- Mix multiple sounds together for custom soundscapes
- Sleep timer with automatic fade-out
- Alarm clock with custom sounds and repeat schedules
- Snooze and wake lock for reliable overnight alarms
- Works offline — installable as a PWA
- Completely free — no sign-up, no ads, no downloads
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