Preserve the source clip
Framing, body movement, wardrobe, and scene come from the video you upload.
AI Lip Sync Generator
Upload an existing video, add an MP3, WAV, recording, or generated voice, then match the visible mouth movement to the new speech for dubbing, localization, or a revised creator message.
Opens Lip Sync Video in Studio. Upload an existing video and a built-in voice or authorized audio track, then confirm usage rights.
1 · Source video
Authorized template · visuals to preserve
New audioSpanish voice
“Hola, hoy te enseño cómo convertir una idea sencilla en un video listo para compartir.”
2 · New audio
Kie Gemini TTS · generated voice
3 · Lip-synced result
Kie API output · reviewed 9:16
Existing video
The source clip supplies the original framing, body movement, expression, and visual timing.
Voice or owned audio
Use a built-in voice or an audio track you have permission to reproduce.
Aligned mouth movement
The workflow changes speech timing while aiming to preserve the source performance.
Match new audio to an existing video
An AI lip sync generator is a finishing workflow. It starts with footage that already exists, then aligns visible mouth movement to a new voice track or authorized audio file.
Replace the speech track
Use clear audio with one primary speaker and minimal noise or overlapping voices.
Support localization
A new language can reuse approved visuals, but translation and timing still need human review.
Check every spoken moment
Inspect mouth closure, consonants, pauses, head turns, occlusion, and the end of the clip.
How to create a lip-synced video
Keep the video and audio clean. The workflow aligns them; it does not verify your rights or the truth of the message.
Upload the video
Choose a clip with a visible mouth, one speaker, stable framing, and no heavy face occlusion.
Add the audio
Select a built-in voice or upload a clean track you own or may use.
Sync and review
Confirm rights, generate the result, then watch the full clip with sound before publishing.
Video + Spanish audio → lip-synced localization
This is one complete task, not two recycled lookalike clips. The source keeps the original scene and performance; the generated audio changes the message; the Kie result changes visible mouth timing to match it.
Spanish localization
Keep the visuals. Replace the speech.
The same source footage is intentionally preserved. Compare the mouth movement while listening to the new Spanish track; that before/audio/after relationship is the proof.
Source video
Original framing and movement
New audioSpanish voice
“Hola, hoy te enseño cómo convertir una idea sencilla en un video listo para compartir.”
New audio
Gemini TTS · Spanish
Synchronized output
New speech and mouth timing
Prepare cleaner audio for better review
Lip sync quality depends on a readable face and an understandable speech track. Improve the inputs before asking the model to reconcile them.
- Use one speaker with clear speech and minimal background music or echo.
- Trim long silence and avoid audio that starts or ends beyond the visible speaking window.
- Prefer video with a visible mouth and limited profile turns, masks, hands, or hair crossing the lips.
- Confirm permission for the face, source footage, voice, script, and uploaded audio.
Use Lip Sync only when the video already exists
If you need to create the visual performance too, start in a different workflow.
Lip Sync
Existing video + new speech. Best for dubbing, localization, and approved message changes.
Talking Avatar
Saved portrait + script or audio. Best when you need a new speaking performance.
Motion Transfer
Appearance image + reference video. Best when body movement—not speech—is the main control.
AI lip sync generator questions
Choose the next workflow
Each route starts from a different input or solves a different production task.
Sync your authorized video and audio in Studio
Use a clear single-speaker clip, clean audio, and the required rights confirmation before creating the result.
Lip sync an existing video