Lip sync any video to a new voice
Upload a clip, then give it a voice — drop in an audio file, or type a few lines and turn them into speech for free. The AI re-renders the lips frame by frame so every word lands on the right mouth shape, while the performance, the camera and the light stay untouched. MP4 or MOV up to 100 MB, 2–10 seconds, billed per second of video.
Source video*
Drop a video here, or click to select
MP4 or MOV · up to 100 MB · 2–10s · 720p or 1080p
Audio*
Text
New voice, original performance
Every clip below came straight out of the tool, with no touch-ups. Drag the handle to compare the sync, then drop your own video at the top of the page.
Studio close-up
Crisp consonants land on every frame, soft light untouched
Golden-hour selfie
Sync holds through warm backlight and drifting hair
Street vlog
Natural head turns keep the words glued to the mouth
Holiday gift
Smiles and pauses stay natural between lines
What this lip sync tool does
It makes the person in your video say something new. You upload a clip and the voice it should speak — an audio file, or text turned into speech on the spot — and the AI re-renders the lip movements frame by frame, so every sound lands on the right mouth shape. The voice changes; the performance, the camera and the light stay exactly as they were. Upload MP4 or MOV up to 100 MB, between 2 and 10 seconds.
Billing is per second of video at 8 credits per second, so a ten-second clip costs 80 credits — the exact price is always shown before you submit. Text-to-speech is free: type up to 256 characters, pick a voice and a speed, and preview the result before you run anything. The finished MP4 keeps the source resolution and the video's length; if the audio ends earlier, the rest of the video plays silent.
The synced clip carries straight on into the rest of the site: keep working on it in the AI Video Editor, or build something new around it in the AI Video Generator. No footage yet? Animate a still into a clip with Image to Video, then bring it back here.
Lip Sync specifications
| Parameter | Value | Notes |
|---|---|---|
| Input | MP4, MOV · up to 100 MB · 2–10s | An MP4 or MOV clip (2–10 seconds, 720p or 1080p) plus a driving audio track or text for speech. One person facing the camera gives the cleanest sync. |
| Audio | MP3, WAV, M4A, FLAC, AAC, OGG · up to 20 MB · up to 30s | The voice track the lips sync to. Upload your own audio, or type text and let a voice read it. |
| Output | MP4 · source resolution · same length as the video | MP4 at the source resolution and length, the new voice in place and the lips re-rendered to match. Audio shorter than the video leaves the rest silent. |
| Standard | 8 credits / second of video | Lip sync at the source resolution, billed per second of video. |
| Result retention | 7–365 days by plan | Results stay downloadable for the retention window of your plan, then are deleted from storage. |
| On failure | Credits refunded automatically | Credits are returned to your balance automatically. |
How to lip sync a video
Three steps from a clip and a voice to a synced video
Add your video
Drag a clip in or click the drop area to pick one — MP4 or MOV, 2–10 seconds, up to 100 MB, 720p or 1080p. One person facing the camera works best.
Add the voice
Upload an audio file, or type a few lines and turn them into speech for free — pick a voice and a speed, and preview it on the spot. The estimated credits are shown before you run anything.
Compare and download
Every result plays side by side with the original in a before/after slider. Download the synced MP4 when it sounds right.
Lip Sync — FAQ
What it costs, what you can upload — and the rules on rights
Give your clip a new voice
Two uploads, one run — the performance stays, the voice changes.