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.
Files never leave your device
Free, no sign-up
No watermark
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
Choose a video first, then an audio file.
2
Pick replace or mix, and set the volume.
3
Press Add the audio and download the MP4.
Tips
Tips for the best result
The first file must be the video. Use the arrows to reorder.
Mix mode keeps the original sound under the new track.
Choose Keep the video length to pad a short song with silence.
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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