Remove background noise

Pick a voice recording and get it back with the fan, traffic or hiss behind it turned down. A video comes back as a video, with the clean sound in place.

Or drop it here. MP3, WAV, M4A, OGG, WebM, or a video (MP4, MOV, WebM). Up to 10 minutes.

No recording yet? Record one in the mic test

Free, no sign-up, no watermark. Your audio is processed on your device and never uploaded.

How the noise remover works

It's built for speech: voice messages, calls, lectures, podcasts and voice-overs.

A neural network trained on speech

The filter is RNNoise, a small neural network from Xiph.org, the makers of the Opus codec. Every 10 milliseconds it splits the sound into frequency bands, estimates how much of each band is voice, and turns down the rest.

What it removes well

Steady noise behind a voice: computer and air conditioner fans, traffic, rain, the hiss of a cheap mic or preamp, the drone of a fridge or a car.

What it can't fix

Other people talking, music, echo from a bare room, distortion from a level set too high, and loud sudden sounds like a dog's bark. Music in the file gets damaged too, because it isn't speech.

Nothing is uploaded

The filter downloads once, about 3 MB, and runs in your browser. Your recording stays on your device, and the cleaned file is made there too.

Find what's making the noise
Hum, fan rumble or hiss: the mic noise test tells you which, so you can fix it before the next recording.
Run the noise test
Reduce background noise
Fixes for each kind of noise, from ground loops to Zoom and Discord settings.
Read the guide

Frequently asked questions

Yes. There's no sign-up, no watermark and no limit on how many files you clean. The only limit is length, set by your device's memory: in Chrome or Edge on a computer, up to 120 minutes per file with 16 GB or more and 60 minutes with 8 GB; 10 minutes everywhere else, phones included.
No. The file is decoded and cleaned in your browser, on your device. Once the page and the filter have loaded, it works even with the internet switched off.
Anything your browser can play: MP3, WAV, M4A, AAC, OGG, Opus, FLAC and WebM, and videos (MP4, MOV, WebM). Download the result as MP3, to send and play anywhere, or as a mono 48 kHz WAV for further editing. A video also comes back as a video.
When the noise is nearly as loud as the voice, the filter has to guess, and some of the voice goes with the noise. Lower the strength: blending a little of the original back in often sounds more natural. A cleaner recording helps most, so move the mic closer to you and away from the noise.
No. RNNoise is trained to keep speech and remove everything else, so instruments are treated as noise. It works best on a single voice.
Not from a website: a web page can't act as a microphone for other apps. Those apps have noise suppression built in. Turn it on in their audio settings; the guide to reducing background noise shows where.
The noise test measures the noise your mic picks up and tells you where it comes from, so you can fix it at the source. This tool cleans a recording you've already made. Fix the source when you can; clean the file when you can't record again.
Three steps after the noise is removed: a filter cuts rumble below 80 Hz, a gentle compressor brings loud and quiet words closer together, and the whole clip is set to −19 LUFS, the usual loudness for a spoken mono file, with peaks kept under −1 dB so nothing clips. Turn it off to get the cleaned audio at its original level.
Yes. Pick the video file, and once the noise is removed, download the video with the cleaned sound in place of the old one. The picture is copied as it is, not re-encoded, so it keeps its quality. If your browser can't rebuild that kind of video, you get the sound as MP3 or WAV to swap in with a video editor.