Add Music to Video Online

Add music to a video online for free: put a song under your clip, fade it in and out, and lower it automatically when someone speaks. No upload.

Open the tool — free

Put a song or background track under your video, fade it in and out, and keep it from drowning out the voice — free, in your browser.

How to add music to a video

1. Click Open the tool above and import your video and your music file (MP3, WAV or M4A).
2. Drag the video onto V1 and the music onto an empty audio track below it.
3. Drag the end of the music clip to match the video's length, or press ⌘K (Ctrl+K) to cut it.
4. Fade it: select the music and set Fade In and Fade Out in Effect Controls ▸ Audio.
5. Click Export.

Keep the voice clear

Select the music and apply Effects ▸ Smart Audio ▸ Auto Duck Music Under Voice. Reelsmith lowers the music by 14 dB wherever someone speaks, with smooth ramps you can adjust. For a constant level, lower Volume instead.

Use the sound effects library

Effects ▸ Sound Effects has 19 original sounds — whoosh, pop, ding, applause and more. Double-click one to add it at the playhead.

Questions

Can I replace the original sound?

Yes. Unlink the clip with ⌘L (Ctrl+L), select its audio and press Delete, then add your music. See remove audio from a video.

Can I add more than one song?

Yes. Place songs one after another, and drag Constant Power from Effects ▸ Audio Transitions between them for a crossfade.

More: Working with audio and Voice effects, sound effects and auto ducking.