Clean Up Voice Recording
Reduce background noise and hum, and even out the level of voice recordings.
Free · No upload · 100% on your device
Clean Up Voice Recording
Choose video or audio files, or drop them here.
MP4, MOV, MKV, WebM, AVI and more · No size or length limit. Nothing is uploaded.
100% on your device
How to use Clean Up Voice Recording
- Choose your recordings, or drop them on the page.
- Pick the settings in the side panel.
- Select “Clean up recording”. The first use downloads the video engine once.
- Download the result. Your original file is left unchanged.
Private by design. Your files are processed in this browser tab and are never uploaded to KittySuite.
About Clean Up Voice Recording
The recording is filtered for rumble and hiss, broadband noise is reduced with spectral noise reduction, and the level is evened out and normalised for speech. Start with Medium; Strong removes more noise but can make voices sound thin. Mains hum removal targets 50 Hz or 60 Hz and its harmonics.
Processing happens in this tab with FFmpeg compiled to WebAssembly; your recordings are never uploaded. The first video or audio tool you use downloads the 10 MB engine once and keeps it cached for next time. On phones, files are processed one at a time to stay within memory, and long recordings take a little longer. Keep the tab open until the download appears.
Clean Up Voice Recording: frequently asked questions
How do I remove background noise from a voice recording?
Choose the recording and a noise-reduction strength. Rumble and hiss are filtered, broadband noise is reduced and the level is evened out for speech.
Which strength should I start with?
Medium. Strong removes more noise but can make voices sound thin.
How do I remove electrical hum?
Choose “Remove 50 Hz” (India, Europe and most of the world) or “Remove 60 Hz” (North America); the harmonics are removed too.
Can it remove music or other voices?
No. It reduces steady noise such as fans, hiss and hum, not other sounds that change like speech or music.