Free Background Noise Remover

A background noise remover lowers unwanted sound behind the main audio, such as hiss or fan noise. This one applies FFmpeg’s afftdn frequency-domain filter in your browser. You choose how strong it is and get an MP3 back.

1. Click Choose files and select your recording. 2. Enter an Effect strength, starting at 12. 3. Click Process audio. 4. Compare with the original, adjust the strength if needed and click Download.

No. It uses a classic signal-processing filter, FFmpeg’s afftdn, which reduces noise across frequency bands. That makes it predictable and fast for steady noise, but it can’t separate a voice from music or crowd sounds the way AI speech enhancers try to.

No. The filter runs in FFmpeg inside your browser, so the audio never leaves your device. The FFmpeg engine is downloaded once from a public CDN and then cached by the browser.

It’s free, adds nothing to the audio and has no daily cap. Each file can be up to 100 MB and 10 minutes long, and you can reprocess the same file at different strengths as often as you like.

An MP3 at 192 kbps, 44.1 kHz stereo, named denoise-audio.mp3. Video files are accepted as input, but only the cleaned soundtrack is exported.

Start at 12 and listen to the quiet gaps between words. Raise it by a few points if hiss remains, and lower it if speech sounds hollow or metallic. The allowed range is 0.01 to 50.

The strength is too high for that recording, so the filter removes parts of the voice along with the noise. Lower the value and process again. For very noisy files, a little remaining hiss usually sounds better than heavy artifacts.

Not reliably. The filter targets steady, broadband noise and treats changing sounds as part of the signal. For those cases, re-record if you can or use a dedicated speech-separation tool.

Yes, in current mobile browsers such as Safari and Chrome. Processing a long file uses a lot of memory, so phones are best for clips of a few minutes; use a computer for longer ones.