Latentsync

latentsync.com

Latent diffusion lip sync for video dubbing

Sync lips to audio in videos with latent diffusion models.

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Overview

LatentSync is an AI-powered video lip synchronization tool that uses latent diffusion models to align speech audio with lip movements in videos. It takes audio files in MP3, WAV, or M4A format and video in MP4 format, and outputs a lip-synced video. It is designed for video creators, filmmakers, and content localization teams who need professional-grade dubbing and localization.

How it works

LatentSync uses audio-conditioned latent diffusion models to directly model audio-visual correlations without intermediate motion representations. It integrates Whisper to convert melspectrograms into audio embeddings for precise synchronization. The system employs TREPA, LPIPS, and SyncNet losses in pixel space for superior tracking and visual quality.

Input and output

The tool supports MP3, WAV, and M4A audio formats and MP4 video format. It offers multi-language support for dubbing and localization, including optimized performance for Chinese content. Users can upload files or enter URLs, and try sample videos to test the service.

Use cases

LatentSync is suitable for video dubbing and localization in movies and TV shows, creating virtual avatars and digital humans, repurposing short-form content for social media, and aligning instructors' lips with localized audio in educational and corporate training materials.

Pricing and plans

LatentSync offers three one-time payment plans: Starter at $9.90 for 500 credits, Pro at $49.90 for 2500 credits, and Ultimate at $99.90 for 5000 credits. All plans include high-quality generation, access to all major AI models, no watermark, and commercial use. Credits are consumed at an average of 10 credits per second.

Key features

Latent diffusion technology
Uses audio-conditioned latent diffusion models for precise lip synchronization without intermediate motion representations.
Multi-language support
Supports multiple languages for dubbing and localization, including optimized support for Chinese content.
High-resolution output
Generates high-resolution 512x512 outputs with temporal consistency for smooth lip movements.
Low VRAM requirement
Runs with as little as 8GB VRAM (v1.5) or 18GB (v1.6) and offers both Gradio App and CLI interfaces.
Open source ecosystem
Provides full access to inference code, checkpoints, and data processing pipelines for custom development.

Use cases

Video dubbing and localization
Dubbing movies and TV shows with translated audio while maintaining lip sync.
Virtual avatars
Creating virtual avatars and digital humans with precise speech alignment.
Social media content
Repurposing and localizing short-form video content for platforms like TikTok and YouTube.
Educational and corporate training
Aligning instructors' lips with localized audio in educational and corporate training videos.

Pricing & limits

From the official site · checked 10/10/2026

Starter$9.90 one-time

Pro$49.90 one-time

Ultimate$99.90 one-time

See current pricing on the official site

Frequently asked questions about Latentsync

What is LatentSync?: LatentSync is an AI-powered tool for video lip synchronization. It uses latent diffusion models to align speech audio with lip movements in videos.
Who is LatentSync for?: It is for video creators, filmmakers, and content localization teams who need to dub or localize videos with accurate lip sync.
Is LatentSync free?: Yes, LatentSync offers paid plans starting at $9.90 one-time for 500 credits. There is no free plan mentioned.
What formats and languages does LatentSync support?: LatentSync supports MP3, WAV, and M4A audio formats and MP4 video format. It also supports multiple languages for dubbing.