Video bench / Soundtrack
Add Audio to Video: Put Music on a Clip or Replace Its Sound
Add music or any sound file to a video: replace the original sound or keep it under the music, set both volumes, choose where in the song to start and when it comes in, repeat it if it is too short, and fade it in and out, then save the video, all in your browser.
Add Audio to Video: Put Music on a Clip or Replace Its Sound: The video is played once and recorded with the new soundtrack: the music is scheduled on the browser's audio clock from the moment playback starts, so it stays in step with the picture, and its volume follows the fade in and fade out you set. The original sound is either left out or mixed at its own volume. The video keeps its length; music longer than the video is cut at the end. Runs 100% locally in your browser with zero server file uploads.
- Category
- Video tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
MP4, WebM, MOV, or any format this browser plays · up to 500 MB
MP3, WAV, M4A, OGG, or FLAC
Only add music you have the right to use; platforms can mute or remove videos with copyrighted songs.
Volumes
Background music under speech usually sits 15 to 20 dB below the voice, roughly 20 to 30% of full volume here.
Rights
Only add music you have the right to use; platforms can mute or remove videos with copyrighted songs.
How to use it
- Choose the video, then the music or sound file.
- Replace or mix the original sound, and set the volumes, start points, and fades.
- Add the sound and download the video.
Privacy & limitations
Your video and music are processed in your browser and never uploaded.
Related tools
Frequently asked questions
Can I keep the voice and add music underneath?
Yes: choose keep it under the music, then lower the music to about 20 to 40% so speech stays clear.
What if the song is shorter than the video?
Tick repeat the music and it starts again from your chosen start point until the video ends.
Can I just remove the sound?
Yes, with the mute video tool; to take the sound out as a file, use video to audio.
Free tool · runs in your browser · no account required