Sleep - Free Online | FunToolX

The page displays multiple sound types: white noise, pink noise, brown noise, rain, waves, thunder, wind, bonfire, bird chirping, cricket chirping, etc. You can turn on multiple sounds at the same time, independently adjust the volume of each sound, and mix them into personalized sleep aid effects. Set the scheduled shutdown time (15/30/60/90 minutes), and automatically fade out and stop after the time.

All sounds are seamless, high-quality audio, played using the Web Audio API, and support multi-track mixing. Volume fades and fades use gain nodes to smooth the transition. Some sounds are provided in multiple versions to avoid fatigue caused by listening for a long time.

It is suitable for people with insomnia to help fall asleep, block noise in the office, improve concentration while studying, or meditate and relax. Natural sounds can mask sudden noises in the environment and help the brain enter a relaxed state.

Sleep aid sound tool provides a variety of sleep aid audio such as white noise, natural sound, and ambient sound. It supports mixed playback and regular shutdown.