Remove Background Noise from Audio
Clean up hiss, fan and room noise, rumble and electrical hum in voice recordings, podcasts and videos. The noise is measured in a pause of your recording and the cleaner is tuned to it — all in your browser.
Free · No sign-upHow to use Audio Noise Reduction
- 1. Drop an audio or video file — MP3, WAV, M4A, MP4, MOV and more. It stays on your device.
- 2. Pick a strength: Light, Medium (best for most voice recordings), Strong, or Custom. Turn on hum removal (60 Hz in the US, 50 Hz in Europe) if you hear a buzz.
- 3. Press Preview 10 s and switch between Original and Cleaned while it loops. The tool also shows how many dB quieter the background became.
- 4. Save as MP3, WAV or M4A, or as MP4 — for videos the picture is kept exactly as it is and only the sound is cleaned.
Frequently asked questions
How does the noise reduction work?
It uses a spectral (FFT) noise reducer. The tool finds the quietest pause in your recording, measures how loud the background noise is there, and tunes the reducer to remove that noise from the whole file while keeping the voice. Low rumble and high hiss can also be filtered out.
Which strength should I choose?
Medium suits most voice recordings made in a room, with a fan or computer noise. Light is for faint hiss when you want to keep every detail. Strong handles loud, steady noise like traffic or air conditioning, but can make voices sound slightly processed.
Can it remove hum or buzz?
Yes. Choose 60 Hz (North America) or 50 Hz (Europe and most other regions) under Hum removal. The tool removes the hum and its first harmonics with narrow notch filters that leave the voice intact.
Does it work on videos?
Yes. Drop an MP4, MOV, WebM or MKV video and save as MP4. The picture is copied without re-encoding, so there is no quality loss, and only the soundtrack is cleaned.
Is my recording uploaded?
No. All processing happens in your browser with WebAssembly. Your audio never leaves your device, there is no sign-up and no watermark.
Why does the result sound a little robotic?
That happens when the reduction is too strong for the amount of noise. Choose a lighter setting, or use Custom and lower the noise reduction amount. Leaving a little natural background noise usually sounds better than removing all of it.