Made with this app
How it works
Sync-3 Lipsync is a video dubbing app that replaces the audio in any existing video and reanimates the speaker's mouth to match the new soundtrack in up to 4K resolution. It works across live-action footage, 3D renders, and AI-generated characters without any model training or fine-tuning. Creators, localization teams, and content producers who need clean, convincing lip sync on finished video will find it directly useful for dubbing, voice replacement, and multilingual translation projects.
How to use this app
- 1
Describe what you want to create, or upload your source file.
- 2
Pick your options, then press Generate.
- 3
Watch your result appear in the gallery within moments.
- 4
Download, share, or generate again with a new idea.
What you can make
Multilingual Video Localization
Translate a finished interview, course lecture, or product explainer into another language, then run the dubbed audio through Sync-3 Lipsync to resync the speaker's lips. The result reads as a native recording rather than an obvious overdub, removing the distraction of mismatched mouth movement.
Voice Replacement on AI Characters
If you generated a character video with another tool but need to swap a placeholder voiceover for a professional recording, Sync-3 Lipsync handles AI-generated faces natively. No retraining is required, and the output holds at up to 4K so quality is not sacrificed.
Correcting On-Camera Flubs
When a presenter misspoke a line in an otherwise perfect take, replace only the audio with a clean re-record and let Sync-3 Lipsync update the mouth animation. This avoids a full reshoot and keeps lighting, background, and framing consistent throughout the clip.
3D Character Dubbing
Studios and indie animators can drop a rendered 3D character video and a new voice track into the app and receive a lip-synced MP4 back. Because the model is zero-shot, it adapts to stylized or non-photorealistic faces without a separate training pipeline.
Social Content Adaptation
Repurpose a single hero video for multiple regional markets by dubbing each language variant and syncing lips in one step. Output is delivered as an MP4, ready for direct upload, covering clips up to 60 seconds long at broadcast-level resolution.
Prompt ideas to try
- Sync the attached Spanish voice-over audio to this English product demo video, preserving the original camera angle and background throughout.
- Replace the presenter's audio in this 45-second training video with the uploaded studio recording and re-sync all mouth movements to match.
- Apply the new French narration track to this 3D animated character explainer and output at 4K resolution as an MP4.
- Dub this AI-generated spokesperson video with the provided podcast-quality voice file and ensure natural lip closure at sentence endings.
- Take this 30-second on-camera interview, swap the audio for the corrected re-read, and regenerate accurate lip sync without altering any other visual element.
- Sync the uploaded German voice dub to this live-action corporate overview video and deliver the result as a 4K MP4 for broadcast review.
Why creators use this app
- Video Dubbing
- 4K Output
- Any Character Style
- Zero-Shot
Tips for better results
Keep Audio Clean and Dry
Sync-3 Lipsync reads the new audio track to drive lip movement, so background music, reverb, or heavy compression can confuse phoneme detection. Submit a dry, unprocessed voice recording and add any music or effects in post after the sync is confirmed.
Match Clip Length to Limits
The app supports videos up to 60 seconds per generation. For longer content, split the source video into segments at natural sentence breaks, sync each segment separately, and then reassemble. Splitting at pauses prevents jarring cuts in the final edit.
Use High-Resolution Source Footage
Because output goes up to 4K, starting with the highest available source resolution gives the model more facial detail to work with and results in sharper lip animation. Upscaling a low-resolution input before submission produces better results than relying on the model to compensate.
Align Timing Before Submitting
Sync-3 Lipsync maps audio phonemes to existing video frames, so the audio and video durations should match closely before upload. Trim silence from the start and end of the audio file to prevent the model from generating unnecessary mouth movement at clip boundaries.
When to choose this app
Choose Sync-3 Lipsync when you already have a finished video and only need the mouth movement updated to match new audio. Apps like OmniHuman v1.5 and Kling Avatar v2 generate new character video from scratch, which means re-rendering the entire scene whenever audio changes. Sync-3 Lipsync leaves everything else in the frame untouched, making it the focused, lower-cost choice for dubbing and voice replacement workflows on live-action, 3D, or AI-generated footage.
Frequently asked questions
Does Sync-3 Lipsync work on faces that are partially obscured or at an angle?
The model performs best on faces that are reasonably visible and forward-facing. Extreme profile angles or heavy occlusion from hands, masks, or props will reduce the accuracy of lip animation. For best results, submit footage where the speaker's mouth region is clearly visible throughout the clip.
Can I dub a video where multiple speakers appear on screen?
Sync-3 Lipsync applies lip sync based on the audio track relative to all detectable faces in the frame. For multi-speaker scenes, it works most reliably when only one person is speaking at a time. Overlapping speech from several on-screen speakers in the same frame may produce inconsistent results.
What audio formats can I upload as the new dub track?
The app accepts an audio file paired with the source video. Standard formats such as WAV and MP3 are supported. For cleanest phoneme detection, a WAV file recorded at 44.1 kHz or higher is recommended. The output is always delivered as an MP4 video file.
Will the background and body of the original video remain unchanged?
Yes. Sync-3 Lipsync modifies only the mouth region to match the new audio. All other visual elements, including the background, clothing, hand positions, and body movement, are carried through from the original video without alteration.
Does the model require any examples or training data from the speaker?
No. Sync-3 Lipsync is zero-shot, meaning it requires no prior examples, fine-tuning, or speaker-specific training data. It analyzes the new audio and the existing video frames on the fly, which is why it can handle live-action, 3D, and AI-generated characters within the same workflow.
How does 4K output affect the visual quality of the lip-synced region?
Rendering at up to 4K means the reanimated mouth area benefits from the same pixel density as the rest of the frame, avoiding the soft or blurry patch that lower-resolution compositing can produce. Starting with high-resolution source footage and delivering a 4K MP4 keeps the synced region visually consistent with the surrounding image.
Which AI model powers this app?
This app runs on Sync-3 Lipsync, available through Arteza with no separate account or setup.
Can I use the results commercially?
Yes. Content you generate is yours to use, subject to our content licenses.
How long does a generation take?
Most generations finish in under a minute, and you can watch progress live in the gallery.