Lip Sync mouths that match

AI lip sync re-animates a speaker's mouth so it matches a new audio track. Vivideo detects the face, maps the sounds in your audio to mouth shapes, and re-renders the lips frame by frame — so a dubbed or replaced voiceover looks natural, not pasted on. It runs in minutes, free to start.

How AI lip sync works

AI lip sync re-animates a speaker's mouth so it matches a new audio track. The model detects the face, breaks the audio into phonemes — the distinct sounds of speech — maps each to a mouth shape, and re-renders just the lip region frame by frame. The result is a video where the mouth genuinely matches the words, not an obvious overdub.

Vivideo keeps everything except the mouth untouched, so lighting, expression and head movement stay natural while the lips follow the new audio. You can sync a dubbed voiceover to the original presenter, match any voice to a talking avatar, or fix a line you re-recorded — all in minutes.

Lip-sync is the difference between a dub that converts and one that feels off. Audiences notice mismatched mouths instantly, so syncing the lips to the localised audio is what makes a translated video feel native. It's also what makes AI avatars believable enough to present, teach and sell.

For the cleanest sync, use a clear, front-facing shot of the speaker and good-quality audio. Heavy motion blur or a face turned away makes the job harder, so favour steady, well-lit footage — and regenerate any moment that doesn't land before you export.