Add Audio to Video
Add music, a song or a voice-over to a video. Set the music volume, start it at any second, repeat it to fill the video and fade it out at the end, and keep the video's own sound underneath or replace it.
A free tool from Arsaze, the AI video editor. Try the editor
Choose the video
Drop a file here, click to browse, or paste one.
MP4, MOV, WebM, MKV
Your file is opened by this page and processed locally on your device. It is not uploaded.
About
Add music to a video online, free. Choose a video, then a song, a voice-over or any file with sound, and this tool lays it over the video. Set how loud the music is, the second it starts, whether it repeats to fill the video, and how long it fades out at the end. It all runs in your browser, so neither file is uploaded.
Keep the video's own sound under the music, at its own volume, or turn it off to replace the sound completely. The new sound runs for exactly the length of the video: a long song is cut at the end, and a short one repeats if you leave Repeat the music on.
When the video already has sound, the picture is copied untouched and only the sound is written again, so there is no loss of quality. A video with no sound at all is written out again with the new track. To remove sound instead, use mute video.
How to use the Add Audio to Video
- 1
Choose the video
Drop the video on the page: MP4, MOV, WebM or MKV.
- 2
Choose the music
Drop a song or voice-over under the preview: MP3, M4A, WAV, OGG, or a video whose sound you want.
- 3
Set the mix
Under Music, set the volume, the start time, Repeat the music and the fade out. Under The video's own sound, keep it or turn it off.
- 4
Export and download
Click Add audio to video, then Download video.
What people use it for
Music under a clip
Put a track under travel footage, a product shot or a reel.
A voice-over
Lay a narration you recorded separately over a screen recording or a montage.
Replacing bad sound
Turn off the original sound and replace wind or noise with music.
Timed entrances
Start the music a few seconds in, after an opening line.
Questions
Is adding music to a video free?
Yes. It is free, needs no account and adds no watermark.
Are my files uploaded?
No. The video and the music are mixed on your device and nothing is uploaded.
Can I keep the original sound?
Yes. Keep it under the music is on by default, with its own volume. Turn it off to replace the sound.
What if the song is longer than the video?
It is cut at the end of the video. With a fade out set, it fades down over the last seconds instead of stopping abruptly.
What if the song is shorter?
With Repeat the music on, it starts again until the video ends. With it off, the rest of the video has only its own sound.
Can I use music I don't own?
Only use music you have the right to use. The tool doesn't check or license music for you.