Why does the output become WebM?

MediaRecorder in Chrome and Firefox encodes to WebM (VP9/VP8). The output format will be WebM regardless of the input format. If you need MP4, run the WebM through a native tool.

How is the audio actually muted?

We add a silent audio track to the recording (a zero-gain oscillator connected to a MediaStreamDestination) so the output file has an empty audio track. There's no possibility of leaking the original audio.

Why does it take as long as the video?

Re-encoding happens in real time — we play the video at 1× and capture each frame. A 2-minute video takes about 2 minutes to mute. Native tools like ffmpeg can do this in seconds.

Is the file uploaded?

No. The video plays locally and frames are captured to a canvas in your browser. DevTools → Network will show zero uploads.

Does this work on iOS Safari?

MediaRecorder support on iOS Safari is limited and captureStream may be unavailable. For reliable results use Chrome, Edge, or Firefox on desktop or Android.

What if my video is very long?

Real-time re-encoding is slow for long videos. For anything over a few minutes, prefer a native tool like ffmpeg (-an flag) — it's faster and produces MP4 directly.

Mute Video

Strip the audio from a video and keep just the picture.

100% private — no uploads Free & unlimited Read tutorial

See how it works

Watch a quick simulation of this tool in action — no file needed.

Mute Video — in action

Drop a video or click to browse

1. Click the drop zone — pick a video with an audio track.

How to use Mute Video

Follow these steps — everything happens instantly in your browser.

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Step 1. Drop a video file (under 200 MB recommended).
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Step 2. Click “Mute video & save”.
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Step 3. The video plays muted in your browser while each frame is drawn onto a hidden canvas and re-recorded.
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Step 4. Download the muted WebM file when finished.