Hiss · hum · background noise — cleaned in your browser

Audio Noise Reduction

Remove steady background noise such as hiss, fan and air-conditioning noise or electrical hum from voice recordings, podcasts and videos’ audio. The tool learns your noise from a quiet moment, lets you hear the same moment before and after, and exports WAV or MP3. Nothing is uploaded.

Learns your noiseBefore / after at the same momentHum 50/60 HzWAV & MP3

1Open audio
2Choose cleanup
3Compare & export

Open a recording

Drop an audio file here, or choose one. MP3, WAV, M4A, OGG, FLAC and WebM work in most browsers.

Up to 150 MB and 10 minutes. Works best on steady noise; it cannot separate voices from music, traffic or sudden sounds.

Open a recording to begin.

Using Audio Noise Reduction

Remove steady background noise — hiss, fans, air conditioning, room tone and 50/60 Hz hum — from voice recordings. The tool learns your noise from a quiet moment and lets you compare the same moment before and after.

Open an audio file, record one, or try the noisy example. The waveform appears and the quietest moment is used as the noise sample automatically.
If the automatic sample contains speech, drag over a pause that contains only noise and press “Use selection as noise sample”.
Choose Light, Medium or Strong cleanup, or Hum only for electrical buzz. Open Fine-tune for the amount, sensitivity, smoothing, rumble cut and hum frequency.
Press play: a 12-second preview is prepared around the playhead. Switch between Original, Cleaned and Removed while it plays — the moment stays the same. Click the waveform to preview another part.
Choose MP3 or WAV and press “Clean the whole recording & download”.

Example

Try the noisy example: a voice with added hiss and 50 Hz hum. The tool picks the noise-only lead-in as the noise sample.
With Medium and Hum removal at 50 Hz, play the preview and switch to Original and back: the hiss and hum drop while the voice keeps its level. “Removed” should sound like noise only.

Questions & answers

What kind of noise can it remove?

Steady noise: hiss, fan and computer noise, air conditioning, room tone, tape hiss and 50/60 Hz electrical hum. It cannot reliably separate voices from music, traffic, dogs barking, clicks or other sudden sounds.

Why does it need a noise sample?

The tool measures what your background noise sounds like in a moment without speech, then removes sound that matches that profile. A clean sample of at least half a second gives the best result; the quietest part is chosen automatically.

How do I avoid a robotic or watery sound?

Start with Light or Medium. Reduce the noise reduction amount or sensitivity, raise smoothing, and check that the noise sample contains no speech. Listen to “Removed”: if you hear words in it, the setting is too strong.

What does Hum removal do?

It removes a narrow band at 50 or 60 Hz and its harmonics — the buzz from mains electricity and ground loops. Use 50 Hz in Europe, Asia and Africa and 60 Hz in the Americas.

Is my recording uploaded?

No. Decoding, noise reduction, previews and MP3/WAV encoding all happen in your browser. Nothing is sent to a server.

Which formats and lengths are supported?

Any audio your browser can decode, such as MP3, WAV, M4A, OGG, FLAC and WebM, up to 150 MB and 10 minutes. Exports are MP3 (192 kbps) or 16-bit WAV.

Is this AI noise removal?

No. It is classic signal processing (spectral noise gating and notch filters), which is predictable and runs locally. AI tools can remove more complex noise but usually require uploading your audio.