video | Kling AI
Advanced Lip Sync
Make anyone in a video say anything — upload a video and an audio file or type the words, and the AI syncs the lip movements perfectly to match the speech
video
Advanced Lip Sync
Kling AI
Advanced Lip Sync makes any person in a video appear to speak any audio you provide. Upload a video where a face is clearly visible, then choose how to provide the speech: upload your own audio file, or simply type the words and let the AI generate the voice for you.
The AI detects all faces in the video automatically. If there are multiple people, you select which face to animate. The selected face gets frame-accurate lip movements that match every syllable of the audio — jaw movement, mouth shape, and timing all synchronized naturally.
Two audio options make this flexible. Upload Audio lets you use any recording — your own voiceover, a translated narration, a song, or a clip from another source. Type Text mode lets you write what the person should say, pick a voice from the catalog, choose a language and emotion, and the AI generates the speech and syncs the lips in one step.
Volume controls let you balance the new speech against the original video audio — keep the background sounds while adding the new voice, or mute the original entirely. Timing controls let you choose exactly when in the video the speech begins and crop the audio start and end points.
This is the key tool for dubbing content into other languages, creating AI spokesperson videos, adding voiceover to silent clips, and producing multilingual versions of the same video.
The AI detects all faces in the video automatically. If there are multiple people, you select which face to animate. The selected face gets frame-accurate lip movements that match every syllable of the audio — jaw movement, mouth shape, and timing all synchronized naturally.
Two audio options make this flexible. Upload Audio lets you use any recording — your own voiceover, a translated narration, a song, or a clip from another source. Type Text mode lets you write what the person should say, pick a voice from the catalog, choose a language and emotion, and the AI generates the speech and syncs the lips in one step.
Volume controls let you balance the new speech against the original video audio — keep the background sounds while adding the new voice, or mute the original entirely. Timing controls let you choose exactly when in the video the speech begins and crop the audio start and end points.
This is the key tool for dubbing content into other languages, creating AI spokesperson videos, adding voiceover to silent clips, and producing multilingual versions of the same video.
Best results
Clear Visible Face Throughout
The face you want to animate must be clearly visible for the entire duration of the video. Frontal shots with good lighting produce the most natural lip sync — avoid scenes where the face turns away or gets obscured.
Minimal Head Movement
Videos where the person is relatively still from the neck up give the best results. Excessive head turning, nodding, or bouncing makes it harder for the AI to track and animate the lips accurately.
One Face at a Time
If your video has multiple people, the AI detects all faces and lets you choose which one to animate. Only one face gets lip synced per generation — run the tool again for additional faces.
Match Audio Length to Face Time
The audio should roughly match how long the face is visible in the video. If the audio is longer than the face screen time, the sync will cut off. Trim your audio or use the timing controls to align them.
TTS for Quick Results
Type Text mode is the fastest path — write the words, pick a voice and emotion, and the AI handles speech generation and lip sync together. No need to record or source an audio file separately.
Balance Speech and Background Audio
Use the volume sliders to control the mix. Turn the original video audio down but not off to keep ambient sounds, or mute it completely for a clean voiceover replacement.
Guides
Advanced Lip Sync
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Video
Advanced Lip Sync — Technical Guide
Make anyone in a video say anything — upload a video and an audio file or type the words, and the AI syncs the lip movements perfectly to match the speech