Remove background noise
Reduce steady hiss, hum and fan noise from a recording.
- Runs on your device — the file is never sent anywhere
- No sign-up, no watermarks, no daily quotas
- Free, with no limit on how often you use it
How it works
Most bad recordings are not badly spoken, they are badly situated: an air conditioner, a computer fan, traffic through a window, the hiss of a cheap microphone. Steady noise like that has a consistent fingerprint, which is what makes it possible to reduce.
What it can and cannot remove
Steady, continuous noise — hiss, hum, fans, air conditioning, road noise — is identified by its constant spectrum and reduced. Intermittent sound cannot be: a door slamming, a dog barking, a keyboard, or someone else talking are all as structured as the voice you want to keep, and no filter of this kind can tell them apart.
The trade-off
Noise reduction always takes something from the wanted signal too. Gentle settings are nearly inaudible in their side effects. Strong ones leave a watery, metallic quality on voices that is often more distracting than the noise was. Start gentle and only increase if the noise is still dominant.
Record better rather than fix later
Moving the microphone closer to the speaker improves the ratio of voice to noise more than any processing can, because it raises the signal instead of attacking the noise. Thirty seconds of repositioning beats any amount of filtering.
It re-encodes
The result is an MP3 at 192 kbps.
Remove background noise — questions
Can it remove someone talking in the background?
No. Speech is as structured as the voice you want, so this kind of filtering cannot separate them.
Which strength should I use?
Start at moderate. Strong settings leave a watery quality on voices that is often worse than the noise.
Will it make a bad recording good?
It will make it cleaner, not clearer. Microphone placement matters far more.
Is my recording uploaded?
No. It is processed in your browser.