Add or Replace Video Audio
Replace the original soundtrack or mix a new audio file with it, locally in your browser. Nothing is uploaded.
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Local video processing
Replace the original soundtrack or mix a new audio file with it, locally in your browser. FFmpeg WebAssembly performs the work on your device, so the source stays private.
Works in your browser
Video encoding happens entirely in your browser using WebAssembly. There is no upload and no queue, but that also means your device does the work — expect a large or long clip to take a minute or more.
How to add or replace video audio
- Add the source video above.
- Choose the options for the result.
- Press Convert and download the MP4.