Replace Video Audio
Replace the original soundtrack with a local music file and adjust its volume.
Local processing · No uploads · No sign-in
Processing and output
Music loops to match the video duration. The original video stream is copied when compatible.
Does my video get uploaded?
No. Selected video, audio, subtitles and fonts are processed in this browser. They are not submitted to a video processing server.
What settings does Replace Video Audio offer?
Music loops to match the video duration. The original video stream is copied when compatible.
Can I keep narration while adding music?
This tool replaces the original soundtrack rather than mixing with it. To preserve narration, provide an audio file that already contains the narration and music you want.
What happens if the music is shorter than the video?
The music repeats until the video ends. Longer audio is cut to the video duration. Review loop boundaries before publishing the result.
Can I process large files on a phone?
Modern browsers are supported. Combined inputs are limited to 300 MB on desktop and 100 MB on phones or low-memory devices, with lower default output resolution. Merge up to 8 clips. Short clips work best; transitions, compression and conversion can take time.
Related video tasks
Remove audio from a video while copying the original video stream without quality loss.
Export the soundtrack of a local video as MP3, WAV or M4A.
Join multiple videos in order with fade, dissolve, slide or wipe transitions and audio crossfades.