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Lip Sync

Synchronize any audio track to any video with AI-powered lip sync. Upload a video with a visible face and an audio file — the model animates the mouth and facial movements to match the audio. Credit Cost: 8–12 credits (model-dependent)
Access: app.wrldwide.ai/lip-sync

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Models

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Sync Labs (Best) — 12 credits

Highest quality lip sync with best accuracy
  • Character: Most natural facial movements, best audio-to-lip accuracy
  • Best for: Professional content, talking head videos, brand spokespersons

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Standard — 8 credits

Reliable lip sync at lower cost
  • Character: Good quality, reliable performance
  • Best for: Most use cases, batch production, iterative testing

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Minimax — 10 credits

Mid-tier quality with Minimax AI
  • Character: Natural motion, balanced quality/cost
  • Best for: Content where Standard is insufficient but Sync Labs is overkill

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Sync Modes

Control what happens when the audio is longer or shorter than the video:
ModeBehavior
Cut OffVideo ends when audio finishes
LoopVideo loops seamlessly until audio finishes
BounceVideo plays forward then backward, repeating until audio finishes

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How to Use

1

Open Lip Sync

Navigate to app.wrldwide.ai/lip-sync
2

Select Model

Choose Sync Labs (best), Standard, or Minimax based on your quality/budget needs.
3

Upload Video

Upload the video containing the face you want to animate.Requirements:
  • Clear, well-lit face visible throughout
  • Face should be mostly forward-facing for best results
  • No heavy motion blur on the face
4

Upload Audio

Upload the audio file to sync to the face.Supported formats: MP3, WAV, M4A
Tips: Clear voice audio without excessive background noise yields the best results.
5

Select Sync Mode

Choose how to handle audio/video length mismatch: Cut Off, Loop, or Bounce.
6

Generate

Click Generate. Processing takes 1–3 minutes depending on video length and model.
7

Download

Preview the synchronized video and download. Review the lip sync accuracy and re-generate with a different model if needed.

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Key Features

Three models give you a quality vs. cost choice. Start with Standard for testing, then switch to Sync Labs for the final production version.
The Loop and Bounce sync modes let you use shorter video clips with longer audio tracks — useful for testimonial-style ads where you have a long voice-over but a short video clip.
The cleaner and clearer the audio, the more accurate the lip sync. Studio-recorded voice-overs consistently outperform audio recorded in noisy environments.

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Use Cases

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Brand Spokesperson Localization

Record one actor speaking in English. Then use Lip Sync to match dubbed audio in Spanish, French, Japanese, etc. — without re-filming. The lip movements adapt to the new audio.

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UGC Ad Personalization

Generate a base talking avatar video, then lip-sync different voice-over scripts to the same video for A/B testing without re-generating the entire video.

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Testimonial-Style Ads

Animate any product photo or AI-generated character to deliver scripted testimonials with voice-over audio.

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Tips for Best Results

  • Video: Use clips where the face is centered and lit clearly
  • Audio: Use high-quality voice recordings (avoid phone recordings)
  • Length: Match audio and video lengths when possible, use sync modes for mismatches
  • Model: Use Sync Labs for professional outputs; Standard for iteration

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Next Steps

Live Avatar

Create talking avatars from photos

Face Swap

Replace faces in images and videos

UGC Video Ads

AI-generated UGC style video ads

Localization

Adapt content for global markets