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Add Audio to Video

Replace the sound of a video with a song or a voice recording, or mix the new audio with the original. Set the volume of the new track and decide whether the result stops at the shorter file or keeps the video length. The result is an MP4 made on your device.

How to use the Add Audio to Video: Choose a video first, then an audio file. Pick replace or mix, and set the volume. Press Add the audio and download the MP4. It is free, needs no sign-up and runs in your browser, so your files are never uploaded.

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How it works

How to use the Add Audio to Video

  1. 1

    Choose a video first, then an audio file.

  2. 2

    Pick replace or mix, and set the volume.

  3. 3

    Press Add the audio and download the MP4.

Tips

Tips for the best result

Questions

Frequently asked questions

Which audio files can I use?

MP3, M4A, WAV, OGG, AAC, FLAC and more.

Can I keep the original sound?

Yes. Choose Mix with the original sound and set the volume of the new track.

Are my files uploaded to a server?

No. The work happens inside your browser on your own device. Your files are never sent to us or to anyone else, and they are gone when you close the page.

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