What is AI video lip sync?

AI video lip sync uses machine learning to modify the lip movements in a video to match a different audio track, creating a natural-looking result.

What video and audio formats are supported?

Videos in MP4, MOV, and WebM formats are supported (up to 200MB). Audio files in MP3, WAV, AAC, M4A, OGG, and FLAC are supported (up to 50MB).

How long does lip sync take?

Processing time depends on video length and server load. Most videos under 60 seconds complete within 2-5 minutes.

Does it work with multiple speakers?

The current version works best with a single speaker facing the camera. Multi-speaker support is planned for a future update.

How are credits calculated?

Credits are calculated based on video or audio duration multiplied by the model's per-second rate. Different AI models have different rates — check the pricing page for details.

Is there a free trial?

Yes. New users receive free credits upon sign-in to test the lip sync feature before upgrading.

Can AI lip sync work with any language?

Yes. The AI model analyzes mouth movements and synchronizes them to the provided audio regardless of language. It works well for dubbing translated audio into the original video.

What is the best AI lip sync tool?

Seedance 2 offers multiple AI lip sync models including Kling Lip Sync for budget-friendly results and LipSync 2 Pro for high-quality output. Try them all for free to find the best fit for your project.

Does Kling AI support lip sync?

Yes. Kling AI lip sync is available on Seedance 2, supporting video lip sync, image-to-video lip sync, text-to-speech with 40+ voices, and adjustable voice speed from 0.8x to 2.0x.

How to lip sync an animation?

Upload your animated character video or image, then provide the voice audio. The AI analyzes the character's face and generates matching mouth movements. Works with 2D and 3D animations that have a clear frontal face view.

Can you lip sync a music video?

Yes. Upload a music video clip and the song audio, and AI will sync the performer's lip movements to the music. Great for fixing off-sync performances, creating cover videos, or matching re-recorded vocals to existing footage.

How to lip sync a video for free?

Sign up on Seedance 2 to receive free credits. Upload your video and audio, select an AI model, and generate a lip-synced result — no editing skills or credit card required.

AI Lip Sync Video

Upload any video and audio file, and let AI generate a realistic lip-synced video. Perfect for video dubbing, content localization, and creative projects.

Upload video + audioAI-powered lip sync0.8x - 2.0x voice speed

Model

Upload Video

MP4 · MOV · WebM · Max 200MB

Upload Audio

MP3 · WAV · AAC · Max 50MB

Estimated cost— credits

Video preview

Upload a video on the left to see the preview

Core

REALISTIC AI LIP SYNC FOR VIDEO & IMAGE

Designed for creators, marketers, and localization teams who need fast, convincing lip sync without manual editing.

Video lip sync

Upload MP4, MOV, or WebM videos up to 200MB. AI syncs lip movements to any new audio track for seamless dubbing or localization.

Image lip sync

Turn a still portrait photo into a talking video. Upload a JPG, PNG, or WebP image up to 20MB and pair it with any audio to generate natural lip movements.

Upload audio or use TTS

Bring your own MP3, WAV, AAC, or M4A audio, or type text directly and let AI synthesize speech with 40+ selectable voices in English and Chinese.

Adjustable voice speed

Fine-tune voice playback from 0.8× to 2.0× to perfectly match the original video timing when working with translated or re-recorded audio.

Multiple AI models

Choose from Kling Lip Sync, LipSync 1, LipSync 2 Pro for video, or OmniHuman and Wan 2.2 S2V for image — each optimized for different quality and budget needs.

Preview and download

Preview the lip-synced result directly in your browser and download the finished video ready for social media, production, or distribution.

Workflow

HOW TO USE AI LIP SYNC

Four simple steps to generate a realistic lip-synced video or talking portrait — no editing skills required.

Step 1

Choose your mode and model

Select Video Lip Sync to sync a talking-head video, or Image Lip Sync to animate a portrait photo. Then pick an AI model based on your quality and budget needs.

Step 2

Upload your video or image

Add the source video (MP4, MOV, WebM — up to 200MB) or portrait image (JPG, PNG, WebP — up to 20MB) containing the person whose lips you want to sync.

Step 3

Provide audio or enter text

Upload an audio file (MP3, WAV, AAC, M4A — up to 50MB) as the new speech, or switch to Text to Speech mode, type your script, select a voice, and let AI generate the audio for you.

Step 4

Generate and download

Submit the task and wait for AI processing. Preview the lip-synced result in your browser, then download the finished video ready for social media or production.

For the most natural result, use a front-facing video or portrait photo where the face is clearly visible, and audio with minimal background noise.

Start lip sync

VIDEO LIP SYNC
FOR REALISTIC DUBBING

Upload any talking-head video and match lip movements to translated voiceovers, new dialogue, or re-recorded audio for a natural result.

Original video

New audio

Lip-synced result

Start video lip sync

IMAGE TO LIP SYNC VIDEO
Bring any portrait to life

Turn a still photo into a talking video by uploading a portrait image and an audio file. AI generates natural lip movements and facial expressions.

Source image

Audio input

Generated video

Start image lip sync

PROMPT + IMAGE LIP SYNC
Full creative control over output

Describe the motion you want and combine it with a portrait photo and audio. Use text prompts to guide facial expressions, head movement, and style — perfect for lip singing performances and creative storytelling.

Source image

prompt.txt

woman singing

Prompt

Audio input

Prompt-guided result

Start prompt lip sync

ADJUSTABLE VOICE SPEED
Control the pace of your lip sync

Kling AI lip sync lets you fine-tune voice speed from 0.8× to 2.0× — slow down for clarity or speed up for energetic delivery. Perfect for matching translated audio to original video timing.

Normal speed

voice-speed.config

2.0×Voice Speed

0.8×1.0×1.2×1.5×2.0×

Speed up for energetic delivery

Voice Speed

Adjusted speed

Try voice speed control

FAQ

AI VIDEO LIP SYNC FAQ

Common questions about AI-powered video lip sync.

For the most natural results, use a front-facing video with clear mouth visibility and audio with minimal background noise.

CTA

LIP SYNC YOUR NEXT VIDEO IN MINUTES

Upload a video and audio, let AI do the work, and download a realistic lip-synced result without leaving your browser.

Start lip sync Pricing