private browser processor
Add Music to Video Online for Free - Mix Audio and MP4
Add a soundtrack while retaining the original speech or ambient audio, with a simple music-volume control for balance.
Frequently asked questions
Is the add music to video free?
Yes. This tool works without an account, subscription or export paywall.
Are my files uploaded?
No. The selected media is processed inside your browser and is not uploaded to Shortsmith for processing.
Which browser should I use?
A current desktop version of Chrome or Edge provides the broadest support for browser-native video encoding. File and codec support can vary by device.
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