Clean Audio (Noise Reduction)
The Clean Audio tool reduces steady background noise (like a fan, air conditioner, or computer hum) from any audio recording, using the open-source RNNoise model running entirely in your browser via WebAssembly. It's built for recorded voice — calls, voice memos, interviews — and is less effective on variable noise like traffic or crowds. The result is exported as a full-quality WAV file, ready to download. All processing — from reading the file to reducing noise to saving the result — happens in your browser; your recording is never uploaded to a server.
Your audio file is processed on your device and is never uploaded to our servers.
Only use this tool with files you own or have the right to process.
This tool reduces steady background noise (like a fan or air conditioner hum) from an audio recording using the open-source RNNoise model — better suited to recorded voice like calls and voice memos than to variable noise like traffic. The result is exported as a full-quality WAV file.
Drag an audio file here or choose one
MP3, WAV, M4A, or OGG
What this tool does
Removes steady background noise from recordings — fan hum, air conditioning, electrical hiss — so speech comes through more clearly.
When to use it
- A recording made in a room with an audible air conditioner, fan or computer.
- An interview recorded somewhere with constant ambient noise.
- A recording from a cheap microphone with background hiss.
- Audio you want cleaned up before publishing.
How to use it
- Put an audio file on the drop area or choose it.
- Wait for preparation, then run the clean.
- Download the result.
A practical example
Input
A ten-minute speech recording with constant air-conditioning hum.
Output
The same recording with the hum clearly reduced and the speech more prominent.
Limitations
- The maximum duration is 30 minutes.
- It works on steady, uniform noise and is much less effective against sudden sounds such as a door closing or another person talking.
- Heavy cleaning can affect how natural a human voice sounds, making it slightly metallic.
- It cannot repair a recording that is already distorted or clipped.
Privacy and processing
The recording is processed inside your browser and is never uploaded.
Technical notes
- Cleaning uses a noise-reduction model that runs locally in the browser with no server call.
Frequently Asked Questions
No — all processing happens in your browser via a locally-running model (WebAssembly); your recording is never uploaded to a server at any stage.