Replace Video Audio
Swap a video's audio track for a new one.
100% private — runs in your browser, no upload
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How to replace video audio
- 1.Drop your video into the box above.
- 2.Add the replacement audio file (MP3, WAV, AAC and more all work).
- 3.Choose whether to match the shorter of the two, or keep the full video length.
- 4.Download the video with its new soundtrack.
Frequently asked questions
- Is my video or audio uploaded?
- No — the swap happens in your browser with WebAssembly FFmpeg, so nothing leaves your device.
- What happens if the audio is shorter than the video?
- Choose 'Keep full video' and the audio is padded with silence so the picture isn't cut short.
- What happens if the audio is longer than the video?
- By default the output is trimmed to whichever of the two is shorter.
- Can I just mute the video instead?
- Yes — use the Mute Video tool to strip the audio entirely, or Change Video Volume to turn it up or down instead of replacing it.