Clean the sound of your MP4, MOV, WebM or MKV videos without touching the picture. Kleervox removes fan hum, traffic, wind and room noise right in your browser — the video is not uploaded for cleaning.
A humming laptop fan, an air conditioner or a street outside can make a good video hard to watch. Re-shooting is rarely an option — cleaning the soundtrack usually is.
No editing software and no timeline. The tool finds the audio track, cleans it and puts it back.
An MP4, MOV, WebM or MKV file straight from your camera, phone or screen recorder.
A speech-trained AI model removes the background noise while keeping the voice natural.
Same format, same picture, clean sound — ready to upload or drop into your editor.
Most video tools decode and re-encode the whole file to change its sound, which costs time and image quality. Kleervox copies the video frames into the new file untouched and only replaces the audio, so the picture is exactly your original.
That is also why a long video is quick to finish: only the sound is processed.
Pick WAV, MP3 or M4A as the output and you get the cleaned soundtrack on its own — for a podcast version of the video, a voice-over pass in your editor, or a transcript.
Choose the YouTube loudness target (−14 LUFS) and the cleaned soundtrack is levelled and limited, so your video sounds as loud as the ones around it without clipping.
Video files are big. Because the cleaning runs in your browser, there is no upload to wait for and your footage never sits on someone else’s server. Files can be up to 30 minutes long on Free and Pro, and up to 3 hours on Creator.
Noise removal works best when the voice is clearly louder than the noise. Put the microphone close to the speaker, switch off fans where you can, and avoid recording right next to a window on a busy road.
If the video has music under the voice, the tool turns the music down instead of cutting it in and out between words, and tells you it did. For a music video with no speech, noise removal is not the right tool.
Recording a video call live? The AI noise cancellation desktop app cleans your microphone before it reaches Zoom, Meet or Teams, so the recording is clean from the start. Cleaning other files? Read how to remove background noise from audio files.
The overview: every format, how the in-browser cleaning works, and the private library.
Episodes, remote interviews and music beds, delivered at podcast loudness.
Phone voice memos, interviews, lectures and dictation recorded in a noisy place.
Try it free: 30 minutes of cleaning a month on the Free plan, no card needed. Pro and Creator add more hours of file cleaning every month, plus unlimited live-call noise cancellation in the desktop app. Files can be up to 30 minutes long on Free and Pro, and up to 3 hours on Creator. Private storage comes with Pro and Creator.
Sign in to Kleervox, open File Cleanup and drop in the video. The soundtrack is cleaned in your browser and the finished video downloads in the same format, with the picture exactly as it was.
No. The video frames are copied into the new file as they are — nothing is re-encoded — so the picture is identical to your original. Only the audio track is replaced with the cleaned one.
MP4, MOV, WebM, MKV. The cleaned video comes back in the same format (an MP4 stays MP4, a MOV stays MOV). Files can be up to 30 minutes long on Free and Pro, and up to 3 hours on Creator.
Yes. Choose WAV, MP3 or M4A as the output format and you get the cleaned soundtrack on its own — handy for a podcast version of a video or for editing the sound separately.
No. The cleaning runs in your browser on your own computer, which also means no waiting for a large upload. Kleervox only receives the video's length, size and type to count it against your plan.
Sign in, drop in a video and download it with a clean soundtrack — the picture stays exactly as you shot it.
