White / pink / brown noise synthesized live, sleep timer with 20s fade

How to use

1. Pick white, pink or brown → Play.
2. Adjust volume; switch type anytime.
3. Optionally arm the sleep timer — it fades out over 20 s.

About this tool

Sleep machines cost $40 for a speaker and a loop. This page generates white, pink and brown noise live with the Web Audio API: white for masking sudden sounds, pink for a softer rain-like spectrum, brown for deep low-end rumble that quiets snoring partners and street traffic. Set the volume, optionally arm a sleep timer for 15, 30 or 60 minutes with a gentle 20-second fade-out so the silence does not jar you awake. One honest limit: audio plays in this tab, so keep the tab open and the device awake. Nothing streams and nothing logs — the noise is synthesized on your device. Everything runs locally in your browser — nothing is uploaded, nothing is sent to any server, and closing the tab erases it all.

FAQ

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