This free tool removes background noise from an audio file directly in your browser, keeping the human voice while suppressing steady noise like fans, air conditioning, hum, and hiss. Your audio is never uploaded — decoding and noise removal both happen on your device.
How it works
The tool decodes your file to 48 kHz mono audio and runs it through RNNoise, a small recurrent neural network trained to tell speech apart from noise. Because the model is tiny and runs locally, processing is faster than real time and completely private. The cleaned audio is returned as a WAV file you can compare against the original and download.
Steps
- Drop an audio file onto the tool (or click to select one).
- Listen to the original in the built-in player to confirm it loaded.
- Click Remove noise. The first run downloads the model (a few MB, cached afterwards).
- Compare the original and denoised players side by side.
- Download the cleaned audio as a WAV file.
Example: a meeting recording with a constant air-conditioner hum → a clearer version where the hum is pushed down and the voices stay intact.
When to use it vs. other tools
| Situation | Good fit? | Why |
|---|---|---|
| Voice memo / meeting with fan or hum | Yes | Steady background noise is exactly what RNNoise targets |
| Podcast or narration with hiss | Yes | Keeps the voice, lowers constant hiss |
| Music or multi-instrument track | No | Tuned for speech; it will harm musical content |
| Removing a voice to keep ambience | No | It suppresses noise, not speech |
| Repairing heavy distortion / clipping | No | It reduces noise; it cannot restore damaged audio |
Formats and output
Any format your browser can decode works as input — MP3, WAV, M4A/AAC, OGG, FLAC, and WebM. The result is always a 48 kHz mono WAV file. Stereo inputs are mixed down to mono before processing.
Private by design
Unlike most online noise removers that upload your file to a server, this tool does everything in the browser. The only network request is a one-time download of the noise-removal model from a CDN; your audio stays on your device.