Browser edition: files stay on your device. Up to 100 MB total and 10 minutes. First use downloads a 32 MB engine. Some formats depend on codec support. Public-link downloading is not ready on this free deployment.
Add audio to video
Put music or a voice-over on any video. Replace the original sound or mix both together.
How to add audio to video
- Add your fileDrop it on the page, choose it from your device, or paste it with Ctrl+V.
- Add audioAdjust settings if you like, then press the button. You'll see live progress.
- Browser processing uses original files on your device. Public-link downloading is unavailable.
Options explained
- Original sound — Replace, Mix with music
- Music volume — 10–200%
- If the music is shorter — Loop it, Stop
FAQ
What if the music is longer than the video?
It is cut at the end of the video.
Can I keep the original sound?
Yes — choose "Mix with music" and set the music volume.
Is it free?
Convert and edit files on your device. The browser edition accepts up to 100 MB total, media up to 10 minutes and video up to 4K. Codec availability and device memory can limit individual jobs.
Are my files safe?
Convert and edit files on your device. The browser edition accepts up to 100 MB total, media up to 10 minutes and video up to 4K. Codec availability and device memory can limit individual jobs.
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