Video Lip Sync — Re-Sync Any Clip to New Audio
Who this is for: For creators and editors who already have footage: dubbing a clip into another take, replacing bad audio with a clean line, matching a translation's timing, or giving a character footage new dialogue.
Upload a video, drop in new audio, and the mouth in the footage is re-synced to the new soundtrack — dub a clip, fix a take, or swap the lines.
Quick answer: Video lip sync re-renders the mouth in existing footage to match a new audio track: upload a clip (up to 10MB) and up to 10 seconds of audio, and the lips are redrawn to the new sound while everything else stays untouched. One free video a day, no signup.
1 free video every day · no watermark · files are prepared locally in your browser
| Input | One video (MP4/MOV/WebM/M4V up to 10MB) + up to 10s of audio |
|---|---|
| Output | MP4 with the mouth re-synced; scene and body untouched |
| Engine | Sync Lipsync 1.9 — a dedicated re-dubbing model |
| Free tier | 1 video/day, no account |
| Credits | 4 videos for $4.99 · 10 videos for $9.99 · 25 videos for $19.99 one-time, PayPal |
| Storage | Nothing stored — results downloadable for 24 hours |
How video lip sync works
Video lip sync takes footage that already exists — someone talking on camera — and redraws just the mouth region, frame by frame, so it lines up with a new audio track. The person, the scene, the lighting and everything else in the frame stay exactly as filmed; only the lips move to the new sound.
This page runs the Sync Lipsync model (v1.9). You upload a short clip plus the new audio, both are prepared locally (audio becomes a clean WAV, the video is passed as-is up to 10MB), and the engine re-renders the mouth region to match. When the audio and video are different lengths, the default mode cuts the output to the shorter of the two — so a 10-second line on a 30-second clip gives you a 10-second video.
Good candidates: a talking-head take where the audio was ruined by wind, a clip you want in another language, a mascot or puppet video getting new lines, or a joke you want to 're-dub' for a group chat. Keep clips short — 10 seconds of audio of speaking, faces reasonably large in frame — and the model has everything it needs.
Common uses
- Rescuing a good take whose audio was ruined by background noise
- Dubbing a short clip so the mouth matches a translated line
- Giving character or puppet footage new dialogue
- Fixing a flubbed line without reshooting the whole clip
- Matching a pre-recorded voiceover to existing footage
Frequently Asked Questions
What video formats and sizes work?
What happens if my audio is longer than the video?
Can it handle more than one face?
Does the rest of the video change?
Is the footage stored?
Can I use any footage?
More guides
Free tiers, watermarks, limits and pricing across the main AI lip sync tools — what each one actually gives you.
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