Audio Noise Reducer
Reduce steady noise, learn a noise profile, filter hum and compare the removed sound.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use Audio Noise Reducer
- Add a recording. Use automatic noise tracking or select a short section containing only background noise to learn a profile.
- Choose a preset, adjust reduction and smoothing, and optionally remove rumble or mains hum.
- Prepare audio, compare Original, Cleaned and Removed noise, then download WAV or MP3.
What are the limits of Audio Noise Reducer?
Files stay on your device. A pinned FFmpeg WebAssembly engine (about 31 MB) downloads from jsDelivr on first use; an internet connection and a modern WebAssembly browser are required. Processing uses one worker thread and can be slow or memory-intensive on phones. Cancel stops the worker. Export re-encodes media, strips metadata and cannot recover missing quality. Encrypted or DRM-protected media is unsupported. Up to 100 MB and 10 minutes of mono/stereo audio. FFT denoising targets steady hiss, fan noise and hum; it does not isolate speakers, music or instruments. Aggressive settings can create artifacts. A learned profile must contain only noise; voice in the sample can damage wanted audio. Removed sound is the original selection minus the processed signal, without independent normalization.