Wav2Lip
AI lip sync tool
Deep Dive Review
Wav2Lip is the open-source standard for lip-syncing video to audio. It takes a video of a person speaking (or singing) and a separate audio track, then adjusts the mouth movements to match — used for dubbing, re-voicing, deepfake-style tests, and AI singing videos. Runs locally, completely free.
Pros & Cons
- Free and open source
- Accurate on clear talking heads
- Works with any audio (speech or song)
- Flexible: local or cloud
- Setup requires a GPU for good speed
- Accuracy drops with angles and occlusion
Key Features
- Free & open-source
- Syncs to any audio
- Handles song & speech
- Local / cloud deployment
- Large community models
Use Cases
- Dub a video into another language with synced lips
- Replace dialogue in an existing recording
- Sync AI-generated voice (ElevenLabs) to any face
- Create AI singing videos
Target Audience
- Video localizers
- AI content creators
- Deepfake researchers (ethical use)
- Voiceover editors
Quick Overview
| Category | Video |
| Pricing | Free |
| Tags | lip-sync, video, open-source |
Frequently Asked Questions
What is Wav2Lip used for?
Wav2Lip syncs a person's lip movements in a video to a separate audio track. Common uses: dubbing, re-voicing, syncing AI voice to a character, and AI singing videos. It is the open-source standard and completely free.
How accurate is Wav2Lip?
It is very accurate on frontal, well-lit faces and clear speech. Accuracy drops with heavy head movement, side angles, and glasses or occlusions. For clean talking-head footage it produces convincing sync in most cases.
How do I use Wav2Lip with ElevenLabs?
Generate a voiceover with ElevenLabs, then feed the audio plus your video clip into Wav2Lip. The result is a character whose lips match the AI-generated speech — the core pipeline for dubbed AI content and AI singing videos.
Is Wav2Lip free?
Yes — Wav2Lip is free and open source. You can run it locally on a GPU, use a cloud notebook, or use one of the hosted web tools built on it. Be mindful of consent and deepfake regulations when applying it to real people.
What is the best AI lip sync tool in 2026?
For free, open-source, full control: Wav2Lip. For polished hosted results with HD output and avatars: tools like HeyGen, Synthesia, and D-ID. Choose Wav2Lip for flexibility and cost, hosted tools for production polish.