Add music to video
Add a song or audio to a video online: replace the original sound or mix both, with volume, music start time and a fade at the end.
Add music to a video
Everything happens on your device: nothing is uploaded to the internet.
Available in: 
Add music to video: what it is for
Upload the video and the song and choose whether the music replaces the original sound or both play together. Set the volume of each, the second the music starts, looping and a fade at the end.
The video image is not re-encoded, so processing is fast with no quality loss. The video is not uploaded to any server: everything is processed in your browser, in full privacy.
How to use
- Choose the video, then the music.
- Set the mode, volumes and start time.
- Process and download the video with music.
When to use it
- Add a soundtrack to Reels and TikTok videos.
- Replace the audio of a noisy video.
- Make birthday and tribute videos.
Frequently asked questions
Can I keep the original sound?
Yes. Choose Mix to keep the voice or sound of the video together with the music, and set the volume of each.
What if the song is shorter than the video?
Check Loop the music so it plays until the end of the video. If it is longer, it is cut at the end of the video with a smooth fade.
Can I use any song?
For personal use, yes. To post on social media, prefer royalty-free music or the network's own library to avoid blocks.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.