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Noise Reducer

Remove hiss, hum, and background noise from recordings with profile-based reduction. Rescue fan-noisy interviews in one pass — local FFmpeg work, unlimited saves.

Runs on FFmpeg

100% Local Browser Native

How to Use the Noise Reducer

1. Upload the noisy file

Interviews with steady background noise.

2. Set reduction strength

Start at Moderate; compare Original vs Processed after each run.

3. Download cleaned audio

Save the file (downloads are unlimited).

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Frequently Asked Questions

What noise removes cleanly?

Constant hiss, fan hum, and room tone — the four levels (Mild, Moderate, Strong, Extreme) drive spectral afftdn (nf -25/-35/-50/-70) or, with the noise-profile box checked, non-local-means anlmdn (s 3/7/12/18). Sudden sounds (doors, coughs) need manual editing instead.

How strong should reduction be?

Start at Moderate: over-reduction warbles voices underwater. If Strong or Extreme sounds metallic, step back down — intelligibility beats silence.

Will voices sound robotic?

Only if pushed too far — conservative settings preserve natural timbre while dropping background. Compare the Original and Processed players after each run and keep the gentlest level that works.

Does noise reduction upload audio?

No — reduction runs locally in your browser with FFmpeg. Only saves touch the network — downloads are unlimited.

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Last updated October 2026