Pick a sound, press Play and set a sleep timer if you want. Brown noise is deep, pink is soft, white is bright.
Stopped
Start quietly and raise the volume slowly. Shortcut: Space plays/stops.
| Type | Sound | How it is made here |
|---|---|---|
| White noise | Bright, like a hiss or a radio between stations | Random values, equal energy at every frequency |
| Pink noise | Softer, like steady rain or wind in leaves | White noise filtered so energy falls toward high frequencies |
| Brown noise | Deep, like a strong waterfall or a distant rumble | White noise integrated, so low frequencies dominate |
Choose a type, press Play and adjust the volume until the noise just covers background sound without being loud. For sleep, pick a sleep timer so the sound fades out by itself. For work or study, many people prefer pink or brown noise because it is less sharp than white noise; try each and keep what feels comfortable. Pair it with the Pomodoro timer for focused sessions.
The sound is generated live in your browser with the Web Audio API as a loop that is crossfaded at the join, so there is no seam and nothing to download. Keep the tab open; some phones stop web audio when the screen locks. This is not a medical device and does not replace advice from a doctor for sleep or hearing problems.
White noise has equal energy at every frequency, so it sounds bright and hissy. Pink noise has less energy at high frequencies (equal energy per octave), so it sounds softer and more balanced. Brown noise drops off even faster toward the high end, so it sounds deep and rumbling, like a strong waterfall or distant thunder.
Yes, but the page must stay open in your browser, and some phones stop web audio when the screen locks. Use the sleep timer to fade the sound out after 15, 30, 60 or 120 minutes, and keep the volume low enough that it does not hurt your ears.
It is generated live in your browser with the Web Audio API from random numbers. Nothing is downloaded or uploaded, and the loop is crossfaded so you should not hear a seam.
Many people find a steady background sound helps cover distracting noises such as traffic or voices, and prefer it for sleeping or studying. Responses are personal and this page is not medical advice, so try the three types and use the one you find comfortable.
See also: Online Timers · Pomodoro Timer · Metronome · Alarm Clock · Countdown Timer · All tools