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How AI Lip Sync Works
- 1
Upload a Video
Upload a video with the face of a person whose lips you want to sync to your audio. - 2
Upload Your Audio
Upload audio with what you'd like the person in your video to say after applying lip sync, or use one of our presets. - 3
Generate and Download
Click "Generate lip sync" to create your video. Download it and share it anywhere.
Lip Sync Video Tutorial
Lip Sync AI Use Cases
Use an AI lip sync tool to dub videos while matching the speaker's mouth movements. Generate the voice with our AI voice generator, or bring a still photo to life with image to video. Create natural-looking voiceovers without reshooting.
Use lip sync to localize videos into new languages while keeping the same visuals. Publish global versions without filming new takes.
Use lip sync to adapt UGC-style ads for different markets. Keep the same performance while swapping language and script.
Upload an avatar video and audio, then Magic Hour syncs the avatar's mouth movements to the speech. Starting from one photo? Use our AI talking photo tool.
Use lip sync to create performance-style clips to songs or audio trends. Pair it with face swap video to put your face on dance trends. Great for short-form platforms and creator experiments.
Use lip sync to update training videos when scripts change. Generate new narration with our AI voice generator. Replace narration while keeping the same footage.
Use lip sync to create testimonial-style videos with consistent visuals. Generate the base clip from a script with our text to video tool. Produce variations that highlight different benefits and objections.
Why Creators Love AI Lip Sync
Use AI lip sync to synchronize a visible face in a video to an uploaded audio track without manual frame-by-frame animation. Results depend on face visibility, source quality, and audio clarity.
Create a new spoken version without reshooting
Pair an existing face video with a different audio track and review the generated synchronization.
Avoid frame-by-frame lip matching
Generate synchronized mouth movement automatically, then review the result for timing and visual artifacts.
Update messaging without a new shoot
Change a line, product name, or offer and regenerate quickly instead of re-shooting or re-editing.
Create personalized variants
Tailor messages for regions and segments while keeping a natural, human on-camera feel.
Create versions for different languages
Publish multilingual content with natural lip movement so it feels native in new markets.
What Lip Sync Creators Say
"I've been using Magic Hour for a major project - creating 12 music videos that tell a complete story. The lip sync has been essential for bringing my characters to life. While I've hit some bumps along the way, Runbo and the team have been incredibly responsive, always refunding credits when things don't work out and actively improving the tools based on my feedback. For a two-person team, they're doing remarkable work."
Gary Keady
Big Island Productions, Musician
"A powerful automation tool that seamlessly synchronizes audio tracks with video content... making it ideal for content creators and video producers seeking professional-grade lip-sync results."
Relevance AI
AI Agent Platform
"As a freelancer, I usually spend 4-5 hours per video trying to get the lip movements to match my voiceovers. Magic Hour handles it in minutes, and the quality is better than doing it manually."
Embody AI
Voiceover Freelancer
"A client asked for their training video in 8 languages. Dubbing would have cost a fortune, so we tested Magic Hour. The results were indistinguishable from studio work. We kept the project in-house, and pitched multilingual services to other clients."
David Kim
Marketing Director
AI Lip Sync Features
Synchronize a visible face in a video with an uploaded audio track
Lip Sync With Uploaded Audio
Use speech or singing audio in different languages, then review lip movement and timing before publishing. Results vary with face visibility and source quality.
Repurpose Existing Footage
Update videos with new messaging or languages in minutes.
Avoid Unnecessary Reshoots
Avoid arranging another shoot for messaging changes or variations. One source video can become multiple reviewed versions for different audiences and markets.
Create Personalized Versions
Create video variations for different segments or regions while reusing the same source footage. Review every version before publishing.
For Developers
Lip Sync API
Sync any face to any audio in any language, automatically.
From $0.023 / sec
50M+ API calls99.9% uptimeFirst API call in ~5 min
from magic_hour import Client
from os import getenv
client = Client(token=getenv("MAGIC_HOUR_API_KEY"))
res = client.v1.lip_sync.generate(
assets={
"audio_file_path": "/path/to/1234.mp3",
"video_file_path": "/path/to/1234.mp4",
"video_source": "file",
},
style={
"generation_mode": "lite",
},
end_seconds=15.0,
start_seconds=0.0,
max_fps_limit=12.0,
name="Lip Sync video",
wait_for_completion=True,
download_outputs=True,
download_directory="."
)200 OKExample responseFrom 24 credits / sec
AI Lip Sync FAQ
Yes, AI lip sync is free with no sign up required. You get 3 free lip syncs per day — no account needed. Free video results include a watermark. Sign up for free to unlock account-specific credits and rewards, saved projects, and access to more tools. Upgrade for more credits, priority processing, and advanced features.
No. AI lip sync works in your browser with no account, no sign up, and nothing to install. Sign up for free to unlock account-specific credits, rewards, and saved projects.
Free video lip sync results may include a watermark. Paid plans and credit packs remove watermarks on video outputs. Photo free tools on Magic Hour do not add watermarks; lip sync is a video tool.
AI lip sync uses artificial intelligence to match a visible person’s mouth movements in a video to uploaded speech or singing. Upload a video and audio track, then preview the generated video. Results depend on face visibility, source quality, and audio clarity. Magic Hour works online with no software download required.
Yes. Lip sync works on real talking-head footage and on AI avatar / virtual influencer clips when a face is clearly visible. Upload the avatar video, add your audio (or a dubbed track), and generate a synced MP4 for ads, education, or social.
Starting from a still portrait? Use our AI talking photo tool to generate a talking video directly from your photo and audio.
Upload a video with a visible face and an audio file with the speech you want to sync. Click Generate and the AI analyzes the audio waveform and maps mouth shapes frame by frame onto the face in your video. The result is a natural, seamless lip-synced video you can download as MP4. The entire process takes seconds to minutes depending on video length.
Starting from a still portrait? Use our AI talking photo tool to generate a talking video directly from your photo and audio.
MP4/MOV uploads can be up to 4K. Output size depends on your plan and source video. The maximum video length is 10 seconds in the free tool and 83 minutes (at 24 FPS) in the full tool. For longer projects, split your content into segments. Both sRGB and Rec709 colorspaces work well. For best results, use front-facing footage with good lighting and a clearly visible face.
Yes! You can either:
- Record your own audio separately and upload it to synchronize with your video.
- Use AI-generated voices or voice cloning in an online voice cloning tool for dubbing.
You can upload speech or singing audio in different languages, including English, Spanish, French, German, Portuguese, Japanese, Korean, Mandarin, Hindi, Arabic, and more. Review lip movement and timing before publishing; results vary with face visibility and source quality. Lip sync changes the video to match your uploaded audio—it does not translate the audio.
Results depend on face visibility, source quality, and audio clarity. For best results, use a front-facing video with a clearly visible face and good lighting, plus clear audio. Preview lip movement and timing before publishing.
Most lip sync videos process in under a minute for short clips. Processing time depends on video length, resolution, and complexity. You can monitor progress in real time and download your result as soon as it finishes.
You can sync:
- Real human videos (talking head, interviews, vlogs, ads)
- AI-generated avatars (for virtual influencers, marketing, and education)
- Animated characters (for lip-synced storytelling and dubbing)—best results with human-like characters (e.g. Pixar style)
For best results, use video with a single visible face, front-facing, with good lighting.
Customers with a paid subscription, a credit-pack purchase, or a separately agreed paid usage-based billing arrangement may use lip-synced videos commercially, subject to our Terms and applicable content rights. This includes ads, social media, e-commerce, client work, and branded content. Users without one of these paid arrangements are limited to personal, non-commercial use.
Yes. Upload your video and a translated audio track to match mouth movements to that audio. Lip sync does not translate speech. For translation and dubbing in one workflow, use our AI video translator. Review voice and lip timing before publishing. Useful for:
- Content localization (YouTube, TikTok, Instagram, movies)
- E-learning and training videos
- Marketing and advertisements
- Dialogue replacement without reshooting
Yes. We offer a robust API for developers and businesses. Full documentation is available at docs.magichour.ai, allowing you to integrate lip sync capabilities directly into your applications or workflows. You can get started with the API for free.
We Value Your Privacy & Data Security, Always
Commercial use, no AI training, deletion controls, and feature-specific retention. Trust & privacy
Commercial use
Subscriptions and credit packs permit commercial use of outputs. Users without either purchase are limited to personal, non-commercial use.
No training
We do not use customer prompts, uploads, or outputs to train AI models. This covers free, paid, and API use.
Delete anytime
Delete saved projects or request account deletion. Retention varies by feature; account deletion has a separate 14-day restoration period.
Security
Encrypted in transit and at rest. Access is restricted for operations and support.
More Free AI Tools
These tools are part of Magic Hour's AI video generator hub—an overview of all our AI video tools, including text-to-video, face swap, lip sync, and more.