Mute Video

Why muting does not need a re-encode

The sound in a video file is a separate stream from the pictures, stored alongside it in the same container. Muting a video properly means leaving that stream out of a new copy of the file — not encoding silence over it, and not touching the pictures at all.

That is exactly what happens here. ffmpeg copies the compressed video stream from your file into a new one of the same format and simply does not include any audio. Nothing is decoded or re-compressed, so the picture is bit-identical to the original: same resolution, same frame rate, same quality, same codec.

It is also why muting is fast. The job is bounded by how quickly the browser can read the file — a few seconds for a typical phone clip, perhaps half a minute for a very large recording — rather than by encoding speed.

Common reasons to remove the sound

Background noise that adds nothing: wind on a beach clip, traffic behind a product demo, a television in the next room. A silent clip is often better than a distracting one, especially for a looping background video on a website.

Privacy. Phones record every nearby conversation. Before sharing a clip publicly — a property walk-through, a screen recording, a video of your children at a park — it is worth asking what is being said in the background.

Music you do not have the rights to. Social platforms detect copyrighted songs in uploads and may mute, block or demonetise the video. Removing the track before uploading lets you add licensed music in the platform's own editor instead.

Replacing the soundtrack. Most editors make adding new audio easier when the clip has none of its own to fight with.

What the muted file looks like

The output keeps the source's container: an MP4 comes back as MP4, a MOV as MOV, a WebM as WebM. Containers this tool cannot write back as they were are saved as MKV, which accepts any video codec unchanged. The file name gets a '-muted' suffix so the original is never overwritten.

The file shrinks by the size of the audio. For a typical phone video that is a few per cent — AAC at 128–256 kbps next to video at 8–20 Mbps — so do not expect a dramatic saving. To make the file smaller, use the Video Compressor afterwards, or choose 'Remove the audio' in its audio setting and do both at once.

A phone video's rotation flag is copied with the video stream, so portrait clips stay portrait. Subtitle tracks and extra metadata streams are not carried over.

Limits worth knowing

Muting removes all audio tracks for the whole length of the video. It cannot silence just one section, lower the volume, or remove one voice while keeping another — those need an editor that can work on the sound itself.

If your file has several audio tracks and you want to keep one of them, use the Video Converter instead, which lets you choose a track (or none).

Because the video is copied rather than re-encoded, any problem in the original — a glitch, stutter or wrong orientation in a player that ignores rotation flags — is copied too. For orientation, the Rotate Video tool re-encodes the pixels upright.

Muting on the phone instead

If the clip is still on your phone, its own photo app can often do this. In the iPhone Photos app, open the video, tap Edit, and tap the speaker icon at the top to turn the sound off before saving. Google Photos on Android has a similar mute control in its video editor. Menus move between versions, so look for a speaker symbol in the edit view.

Those apps typically save a re-encoded copy. This tool is for the files that are already on a computer, the formats phone apps will not open — MKV, AVI, WebM — and for anyone who wants the picture left exactly as it was recorded.

Nothing leaves your device

The video is read from your disk by ffmpeg running in this browser tab, and the silent copy is written in memory and offered as a download. No part of the file is sent anywhere. The only download is the 32 MB engine, on first use.