Audio

Add audio to video

Lay a music track over the video, keeping or muting the original.

Drop your files here, or paste with Ctrl+V

One file, 2 GB, up to 180 minutes per file.

Files stay on your device. Nothing is uploaded and there is no account.

What is this tool?

Lays a soundtrack over the video with volume and start controls and an option to mute the original audio.

What is it for?

  • Add background music to a video recorded without sound.
  • Put narration over supporting images.
  • Keep ambient sound and add a quieter track.

Step by step

  1. 1Upload the video and the audio file.
  2. 2Set the track volume and the second at which it starts.
  3. 3Choose whether the original audio stays or is muted.
  4. 4Process and download the mixed video.

How to use it

Volume

Controls how much the track sits over the original audio. For narration over ambient sound, keep the track at medium volume.

Audio start

Sets the second the track begins. This allows aligning the music to a specific moment in the scene.

Original audio

Can be kept or muted. Muting is the same as using only the new track.

Examples in practice

Discreet background music

A product video receives a low-volume track while the original narration stays audible.

Narration over images

A silent clip receives narration starting at second zero, with the original audio muted.

Frequently asked questions

Is the original audio erased?
Only if you choose to mute it; otherwise it is kept and mixed with the track.
What if the track is longer than the video?
The video keeps its own duration; the track's excess part is not used.

Questions

Which audio formats can I read?
Whatever the browser decodes: MP4/AAC, WebM/Opus, WAV, OGG, MP3 and FLAC in most builds.
Can I export MP3?
The browser does not encode MP3. Audio is delivered as WAV, without quality loss.
Video