DenoiseKit.Try it free

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How do I reduce background noise on a voice recording?

Clean short voice clips on your device — preview before/after, then export WAV or MP3.

Runs locally in your browserBefore/after proof listenOne-time packs from $6.99

Your audio, upgraded.

FREE TOOL

Drop → Processing → Compare/proof → Export

01 · Drop

Drop an audio file here

Or click to choose — voice clips work best

WAV, MP3, M4A, OGG · MP4, WebM, MOV
Up to 5 minutes · 100 MB per file

Runs locally · 3 files/day · 5 min max. Video input exports audio only.

Free local: audio stays on-device3 free files / day

A fan behind a podcast microphone

Select a spoken clip that includes a pause. Run cleanup, then compare the fan during that same pause and the consonants in the next sentence. RNNoise may reduce steady noise, but loud noise overlapping speech can remain.

Preserve intelligibility, not just silence

Compare both previews at similar listening levels. If words sound softened or watery, keep the original and improve the recording setup. DenoiseKit converts stereo to 48 kHz mono; it is not a stereo mastering tool.

A cleaner take on everything you record.

◉ Podcasts▣ Online meetings♫ Voice notes▷ Video voiceovers

FROM DISTRACTING TO DISTINCT

A free cleanup, from file to finished.

No complicated settings. No software to install.

01

Bring your recording

Select the voice note or interview you want to rescue. Short clips work best; the free limit is five minutes.

02

Let the noise fade

Open-source RNNoise AI reduces background noise on your device. Designed for speech, not music or studio mastering.

03

Listen. Compare. Keep.

Preview both versions, then download your clean voice track as WAV or MP3. No watermark, no account required.

PRIVATE BY DESIGN

Your voice stays in your hands.

Processing happens here, not on a server. No audio uploads. No account needed for local use. Optional Google sign-in loads Google scripts only when requested.

Our privacy promise ↗

GOOD QUESTIONS. CLEAR ANSWERS.

A little less uncertainty.

Everything to know before you hit clean.

What background noise is worth trying to reduce?

Steady fan noise, low hum and light hiss behind speech are useful test cases for RNNoise. Results vary. It does not separate overlapping speakers or restore clipped audio.

How can I record less noise in the first place?

Move closer to the microphone, turn off nearby fans when safe, and record away from traffic. Check a short test with headphones before recording the full session.

What does a free cleanup include?

Process 3 files per local calendar day, up to 5 minutes each, in your browser. Preview both versions and download mono WAV or MP3. No recording upload or signup is required.

Let your voice do the talking.

Start with 3 free files a day. More room is on the way.

Clean audio — open the toolMore about reducing background noise →

Choose the right cleanup approach

Speech denoising is not an echo cancellation or dereverb tool.