Add Audio to Video — Put Music on a Video Free Online
Silent clip? Add the soundtrack: this tool adds an audio file to your video — either replacing the original sound completely or mixing music underneath the existing audio.
Add Audio to Video
Put a song on your video — replace the sound or mix it underneath.
1 Add your video file
+ Add the audio file
2 Settings
3 Process & download
✅ Done — your video is ready
How to use it
- Add your video, then add an audio file (MP3, WAV, M4A…).
- Choose replace or mix — mix keeps the original sound under your music.
- Process & download.
About this tool
Music transforms footage: a travel clip becomes a montage, a product demo becomes an ad. Replace mode is the clean choice when the original audio is noise or silence; mix mode is for narration over background music. The video stream is copied without re-encoding, so processing is fast and quality is untouched.
Only use music you own or that is licensed for your use — platforms detect copyrighted tracks and may mute or block the video.
Frequently asked questions
What if the audio is longer than the video? In replace mode the output stops at the shorter of the two. In mix mode it follows the video’s length.
My video has no audio track — does mix work? Mix needs an original track to blend with. If your video is silent, use replace mode.
Are my files uploaded? No — video and audio are combined in your browser.
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