Add Background Music
Add background music to your video — processed in your browser
1. Choose a video
2. Choose background music
3. Options
4. Create
Add background music to your video. The music automatically loops to cover the full video length, and you can adjust volume and fade in/out. If the video has original audio, you can mix it with the music or replace it entirely. Everything runs in your browser.
What you can do
- ✓Music auto-loops to cover the video length
- ✓Adjust music volume and fade in/out
- ✓Use only the section of the video or music you pick
- ✓Mix with or replace the original audio
- ✓MP4 (faststart) output
How to use
- 1Upload a video
- 2Upload background music
- 3Adjust volume and fade, then press Create
Supported formats · MP4 · MOV · WebM · MKV + MP3 · M4A · WAV → MP4
Add background music to your video. Even if the music is shorter than the video, it automatically loops to fill the full length, and you can adjust volume and fade in/out with sliders. If the video has its own sound, you can choose to mix it with the music or replace it entirely. Everything runs inside your browser, so the files are never uploaded to a server.
How to use it
- 1Select or drag in a video.
- 2Select the audio file to use as background music.
- 3Adjust volume and fade in/out, decide whether to keep the original audio, and press Create.
When it comes in handy
For example, it's handy when you want to lay calm music over a silent vlog or timelapse.
Even videos that already have sound can get a subtle mood boost by mixing in background music at a low volume.
What happens if the music is shorter than the video
The music automatically loops to fill the entire video length with no gaps. Conversely, if the music is longer than the video, it's trimmed to match. The fade-out is applied right before the video ends.
Frequently asked questions
Are the files uploaded to a server?+
No. Everything runs inside your browser, so the files never leave your device.
What happens to the original video sound?+
It's controlled by the 'Keep original audio' checkbox. Checked mixes it with the music; unchecked leaves only the music.
What if the video has no audio track at all?+
In that case only the music remains, regardless of the checkbox.
Can the music be shorter than the video?+
Yes. It automatically loops to fill the video's length.
Can I start the music from a specific part?+
Yes. Turn on 'Use only a section of the music' and drag on the bar to pick just the span you want — the video supports section selection the same way.
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