Free AI Audio Noise Remover

Auto-remove background noise with FFmpeg's AFFTDN (Adaptive FFT Denoiser) — similar tech to Adobe Audition, but free and install-free.

Automatic Noise Reduction
Upload a file and let AI handle it. Works best with voice and podcasts.

About this online audio noise remover

Phone, webcam, or handheld recorder audio often carries background noise — fan hum, wind, 50/60Hz electrical hum, traffic. This noise tanks the perceived quality of podcasts, voice-overs, and lecture videos.

OneAudio Enhancer applies FFmpeg's afftdn (Adaptive FFT Denoiser) filter with a -25 dB threshold — strong enough to cut white noise and hum, gentle enough to preserve voice nuance. It scans each frequency frame and zeroes the ones below threshold, similar to Adobe Audition DeNoise or basic iZotope RX.

  • Cleans white noise and 50/60Hz hum effectively
  • Preserves natural voice character — no robot sound
  • -25dB threshold balances cleaning and preservation
  • Great for podcasts, voice-overs, livestream audio, phone recordings
  • Processes 1 minute of audio in 5-10 seconds
  • 192kbps MP3 output, ready to publish

Remove audio noise online in 3 steps

  1. 1

    Upload the noisy recording

    Drop in an MP3, WAV, M4A, or MP4 video to clean up. Up to 200MB.

  2. 2

    Click Start Enhancing

    AFFTDN runs automatically — no parameters to tune. Handles 90% of typical cases.

  3. 3

    Download the cleaned MP3

    Compare before and after — background drops noticeably, voice sounds brighter. Run twice for an even stronger pass.

Real uses of audio noise removal

Clean up home-recorded podcasts
Home podcasts often have fridge or AC noise. The Enhancer strips the background for a studio-clean voice.
Outdoor interview recordings
Heavy wind or passing traffic — the Enhancer cuts ~80% of meaningless noise while keeping every word.
Classroom lecture videos
HVAC rumble and audience whispering — run lectures through the Enhancer before uploading to YouTube so viewers stay focused.
Rescue urgent phone recordings
Phone-recorded evidence calls are often noisy — the Enhancer makes the important words audible.

Frequently asked questions about audio noise removal

Can it remove other people's voices?
No. AFFTDN only removes stationary noise like wind, hum, fans. Another voice is non-stationary signal — you'd need dedicated AI voice separation (e.g., Demucs, not yet on OneAudio).
Why does my voice sound a little plasticky after cleaning?
That's a classic denoising artifact when thresholds are too aggressive. OneAudio uses a safe -25dB, but on very clean sources you may notice slight change. If the source is already clean, skip the enhancer.
Can it remove hiss?
Yes, AFFTDN cuts high-frequency hiss fairly well. Any residue — pull 4-8kHz down another 3-6dB in the Equalizer.
Is running it twice harmful?
Not harmful, but not recommended — voice gets thinner with each pass. Run once, then fine-tune with Booster or Equalizer instead.
Does music lose any content?
Low and high frequencies can get clipped slightly — AFFTDN is tuned for voice, not music. Use sparingly on music files.
Can I customize the -25dB threshold?
Not in the current version. If you need stronger denoising, run twice — roughly equivalent to -50dB.