Reduce Background Noise
Remove background noise from a voice note, interview, lesson or video with RNNoise, a speech model that runs on your device.
What it does
Reduce Background Noise works on MP3, WAV, M4A, AAC, OGG, OPUS, WEBM, MP4, MOV and M4V with ffmpeg and audio engines compiled for the browser, so the recording or video is processed by your own computer or phone — the same programs a desktop editor uses, without installing one.
When you need it
Usually right before sending or publishing: a video too heavy for WhatsApp, a voice note full of hum, a clip that needs captions because the feed plays it muted, an interview to turn into text.
Limits and caveats
Long or high-resolution files take as long as your device needs, and a phone is slower than a laptop. The engines download once, the first time, and come from KIVO itself. The original file is never changed: you always download a new one. Everything happens in your browser, so the file never leaves your device.
How to reduce background noise
- Drop or choose your MP3 file.
- KIVO processes it instantly — no waiting for uploads.
- Download the result. That's it.
Frequently asked questions
- Does it work on music?
- Not well: it is trained to keep speech, and takes most music for noise.
- What happens to a video?
- The picture is copied untouched and the cleaned sound replaces the old one.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.