White Noise Generator
A steady hiss with equal energy across every frequency — the classic sound-masking choice for blocking out background noise.
About this tool
White noise has flat, even energy across the whole frequency range — like a detuned radio or a steady hiss. That full-spectrum coverage is what makes it effective at masking a wide range of background sounds, from traffic to chatter. Played entirely in your browser, nothing is recorded or uploaded.
The sound fades in gently rather than starting with a jolt. Set the volume before you start, and use the sleep timer to have it fade out slowly and stop by itself. The timer runs on the audio clock, so it still works if you switch to another tab, though a phone may pause the sound when the screen locks. If you use headphones, keep the volume low: steady noise can be surprisingly tiring at high levels.