Local · Private · Free

White Noise & Ambience

Mix white, pink and brown noise with rain, fan and ocean ambience for focus or sleep. Every sound is synthesized live on your device, no audio files, no streaming, no upload.

Sound generation isn’t available here

Your browser doesn’t support the Web Audio API (AudioContext). Try the latest Chrome, Edge, Firefox, or Safari.

Nothing plays until you click a sound (browsers require a tap to start audio). Everything is generated locally, it even works offline.

Master volume, 80%

0 sounds playing

Sleep timer

The mix fades out gently over the last 15 seconds, then stops. Keep this tab open while playing, pin it if you like; some phones pause audio in background tabs or when the screen locks.

Export your mix as WAV

Renders the sounds that are currently playing, at their current volumes, into a downloadable 16-bit stereo WAV (~10 MB per minute). Loop it in any player.

Length

No samples, no streaming, pure synthesis

Ambience sites usually stream big audio loops from a server. Here, white noise is a buffer of cryptographically random samples; pink and brown run that randomness through filtering integrators so the energy shifts toward lower frequencies; rain is band-passed noise sprinkled with randomized droplet blips; the fan is a low hum plus band-passed noise with a blade-rate wobble; and the ocean swells with slow LFOs on gain and filter. It all runs through the Web Audio API on your device, private, offline-capable, and free.

About White Noise & Ambience

White Noise & Ambience is a free, private browser tool by Digital Heroes. It synthesizes six ambient sounds live in your browser: white, pink, and brown noise, plus rain, fan, and ocean. You can layer any combination, adjust each volume independently, and set a sleep timer that fades the mix out gently after 15, 30, 60, or 90 minutes. Everything is generated on your device. Nothing is uploaded, no sign-up is needed, and the tool works offline once loaded.

What you can do

Play white, pink, or brown noise to mask distractions and improve focus.

Layer rain, fan, and ocean sounds together in any combination with per-track volume controls.

Set a sleep timer for 15, 30, 60, or 90 minutes (or a custom duration), with an automatic 15-second fade-out.

Export your mix as a WAV file (30 seconds, 1 minute, or 3 minutes) for use in any audio player.

Use it completely offline: once the page loads, no internet connection is required.

Stay private: all synthesis happens locally, no audio is sent to a server, and no account is needed.

How to use White Noise & Ambience

Open White Noise & Ambience in your browser. No sign-up or installation required.

Click Play on any sound card to start that sound. You can play several at once.

Drag the volume slider on each card to balance the mix to your liking.

Optionally set a sleep timer so the mix fades out automatically when you fall asleep.

Click Download WAV to export a loopable audio file of your current mix.

Frequently asked questions

Is White Noise & Ambience free?

Yes. White Noise & Ambience is completely free for everyone. No sign-up, no account, and no usage limits.

Is it private? Is any audio uploaded?

No audio leaves your device. White Noise & Ambience synthesizes all sounds locally in your browser using the Web Audio API. Nothing is uploaded to a server.

Does it work offline?

Yes. Once the page has loaded, the tool keeps working without an internet connection. You can also install it as an app from your browser for quicker offline access.

Do I need to install anything or create an account?

No. Just open the page and click Play. Installing it as an app is optional.

What sounds are included?

Six sounds are available: white noise, pink noise, brown noise, rain, fan, and ocean. You can play and layer any combination, with individual volume controls for each.

How does the sleep timer work?

Pick a preset (15, 30, 60, or 90 minutes) or type a custom duration up to 720 minutes. The mix fades out smoothly over the last 15 seconds, then stops automatically.