Add audio to video
New soundtrack. Same video.
Replace a video's existing audio with your own, or mix a new track over the original (keep the dialogue, add background music). Volume controls, start offset, optional looping.
Video file
MP4, MOV, MKV, AVI, WebM and more · up to 500 MB
Audio file
MP3, WAV, M4A, FLAC, OGG, Opus and more · up to 200 MB
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Mode
Drop the video's original soundtrack; only the new audio track plays.
Video audio volume 100%
Set to 0 to keep the video's audio muted (same as Replace mode).
New audio volume 100%
New audio starts at 0seconds into the video
Output length
Output format
Video re-encoding can take 1–3× the clip length, depending on size.
Replace or mix soundtrack
Per-track volume
Audio start offset
Loop shorter audio
MP4 · MOV · MKV · WebM