Sleep Sounds Timer – White Noise, Ocean & Forest

Research suggests that white noise and pink noise can help people fall asleep faster by masking disruptive environmental sounds. Ocean waves and forest sounds add a natural, soothing quality that many find calming. Brown noise, with its deeper tones, is excellent for those who prefer lower frequencies. The best sound is the one that you personally find most relaxing.

When you set a sleep timer with fade-out enabled, the volume gradually decreases during the final minutes of your timer. For example, setting a 30-minute timer with a 5-minute fade-out means the sound plays at full volume for 25 minutes, then gently fades to silence over the last 5 minutes. This prevents abrupt silence that might wake you.

All sounds are generated in real-time using your device's audio processing capabilities (Web Audio API). No audio files are downloaded or streamed, so the tool works completely offline after the page loads. This ensures zero latency and no data usage while you sleep.

Yes, this sleep timer is fully responsive and works on mobile devices. For the best experience, we recommend keeping your device plugged in, setting your preferred timer, and placing the phone face-down or with the screen dimmed. Most mobile browsers support background audio playback.

White noise has equal energy across all audible frequencies, sounding like static or a fan. Brown noise (also called red noise) has more energy at lower frequencies, creating a deeper, rumbling sound similar to distant thunder or a waterfall. Pink noise sits between them, with a balanced, natural tone often compared to steady rain. All three are effective for sleep; it's a matter of personal preference.