Audio Noise Reducer
Reduce constant background noise from an audio with a spectral denoiser. 100% in your browser.
Drag your audio here or click to select
MP3, WAV, OGG, FLAC, M4A, AAC · no artificial size limit
Built by
Miguel Ángel Colorado Marin (MACM)
Built by
Miguel Ángel Colorado Marin (MACM)
Full-Stack Developer · Guadalajara, España
I develop web apps, digital tools and full projects — from design to deployment.
The noise reducer removes constant background noise from a recording, like a fan hum, cheap microphone hiss, or room ambient noise, using an adaptive spectral denoiser (based on FFT frequency analysis) that learns the noise profile from the signal itself and subtracts it. Upload your MP3, WAV, OGG, FLAC, M4A or AAC file, choose a preset strength (light, medium or strong) or fine-tune the reduction in decibels, and download the result. It's most effective on constant, broadband noise (fans, air conditioning, electrical hiss) rather than one-off noises like bumps or clicks. All processing runs with FFmpeg compiled to WebAssembly inside your own browser.
Features
- ✓Adaptive spectral denoiser (FFT)
- ✓3 predefined strength levels
- ✓Fine-tune in dB
- ✓MP3, WAV, OGG, FLAC, M4A, AAC
- ✓100% in browser, no uploads
How to reduce noise in an audio file?
- 1
Upload your audio
Drag the file or click to select it.
- 2
Choose the strength
Light, medium or strong, depending on how much background noise the recording has.
- 3
Fine-tune if needed
Raise or lower the reduction decibels to find the sweet spot.
- 4
Download the result
Listen to the result in the player and download it with one click.
Frequently asked questions
Is my audio uploaded to a server?
No. Everything runs with FFmpeg compiled to WebAssembly inside your browser. The file never leaves your device.
Why does the audio sound "robotic" at high strength?
It's a normal side effect of any spectral denoiser when pushed too hard. Try a lower strength if you notice that artifact.
Does it work well on one-off noises like bumps or clicks?
No, it's designed for constant background noise (fans, hiss, electrical hum). For one-off clicks you'd need a different audio repair tool.
What formats does it support?
MP3, WAV, OGG, FLAC, M4A and AAC. The result downloads in the same format as the original file.
Related tools
Embed Audio Noise Reducer on your site
Add Audio Noise Reducer to any web page with a simple iframe. Free, with attribution to miguelacm.es.
<iframe
src="https://miguelacm.es/embed/audio-noise-reduce"
width="100%"
height="700"
frameborder="0"
title="Audio Noise Reducer — miguelacm.es"
></iframe>