Features

Everything Kleersonic does for a recording

One job, done properly: take the noise out, leave everything else exactly as it was.

Cleaning

Take the noise out, keep the voice exactly as it was.

Noise removal built for speech
Fans, air conditioning, traffic, keyboard clicks, ventilation and café chatter fall away between and behind the words, while the voice keeps its natural tone. Soft word endings are protected, so nothing sounds chopped.
Loudness, handled
Land on −16 LUFS for podcasts, −14 for YouTube or −23 for broadcast, with a true-peak limiter so nothing clips. A voice clarity EQ adds presence.
Long recordings
Hour-long lectures and episodes work: your browser keeps its working copy on disk, not in memory. Paid plans take files up to 3 hours and 4 GB each.

Your picture untouched, your file back the way it came in.

Video kept as-is, lips in sync
The picture is copied bit for bit — never re-encoded, never softened. Only the audio track is replaced, lined up to the sample from the first frame to the last.
The formats you record in
Video: MP4, MOV, WebM and MKV. Audio: WAV, MP3, M4A/AAC, OGG/Opus and FLAC.
Downloads by itself, same format
When cleaning finishes the file downloads in the format it came in — MP4 stays MP4. Or save the audio alone as WAV, MP3 or M4A.

Paid plans add a private library, and transcripts of what you store there.

Transcripts and captions
On paid plans, turn any file in your library into plain text, text with timestamps that jump to the moment on YouTube, .srt or .vtt captions and suggested YouTube chapters. 30 languages, or let it detect the language. Only when you click Transcribe is the audio sent to our speech AI, which keeps nothing.
A library for your takes
On paid plans, “Save to library” uploads a cleaned file to your private storage, so you can download it again from any device. Only when you choose to.

Where your files go, and for how long.

Never leaves your device
The AI runs inside your browser. Only the file’s length and format reach us, to check your plan’s limits. A file goes further only if you choose to: saving it to your library uploads it, and transcribing sends its audio to our speech AI.
Read the privacy policy

Tips and the settings that suit podcasts, videos, lectures, meetings and more.

Drop a file into the online tool and compare it in seconds. Free account, no card needed.