# Lip Sync AI > Lip sync AI matches a mouth to an audio track in 2 ways: it animates a photo into a talking video, or it redraws the lips on an existing video. Kenerate's Avatar Talk has 19 photo engines and 7 video engines; Sync Lipsync 3 gives the most precise lips and InfiniteTalk handles 10-minute takes. URL: https://kenerateai.com/lip-sync-ai Publisher: Kenerate AI (https://kenerateai.com) Last updated: 6 October 2026 ## Key facts - Lip-sync engines: 26 (19 photo, 7 video) - Longest speech: 10 min - Two speakers: Photo and video - Emotion control: Sync React-1 (6 emotions) - Upload limits: Image 20 MB · audio 50 MB · video 200 MB - Free plan: Yes - Sync Lipsync 3 (Sync Labs): Photo + up to 5 min audio → Engine decides. The most precise mouth shapes from a photo. - Kenerate Avatar (Kenerate): Photo + up to 10 min audio · prompt → 720p or 1080p. Long presenter videos with body movement. - OmniHuman 1.5 (ByteDance): Photo + up to 60 s audio → Engine decides. Lifelike full-body performances and singing clips. - LTX 2.3 Lipsync (Lightricks): 5–20 s audio · photo optional → 480p, 720p or 1080p. Short, sharp social clips. - VEED Lipsync 2 (VEED): Video + audio, up to 5 min → Runs as long as the speech. Re-voicing an existing clip. - Sync Lipsync 3 · Video (Sync Labs): Video + audio, up to 5 min → Cut, loop, bounce, pad or retime. Exact lips when video and audio lengths differ. - Sync React-1 (Sync Labs): Video + audio, up to 15 s → Lips, face or whole head. Changing the emotion, not only the lips. - InfiniteTalk Fast · Video (WaveSpeed): Video + audio, up to 10 min → Lips + natural head motion. Long lessons and talks. ## Steps 1. Choose photo or video mode — Photo mode makes a still picture talk; video mode keeps an existing clip and only re-syncs the mouth. 2. Add the face — Upload a front-facing image (up to 20 MB) or a video with a clearly visible face (up to 200 MB), or pick one from History. 3. Add the audio — Upload speech or a song (up to 50 MB), record it with the mic, or write it in Voice Studio and pick the take from History. 4. Pick the engine for the job — Use the table below: precise lips, long takes, two speakers, emotion or short 1080p clips each have a best fit. ## In depth ### Why there are two kinds of lip sync A photo has no motion to keep, so the engine has to invent the whole performance: blinks, head turns, the mouth. A video already has a performance, so a good engine only touches the mouth and lower face and leaves everything else as it was filmed. That is why the two modes use different engines, and why video lip sync looks more natural on real footage. ### Picking an engine in one minute Start from the job, not the brand: - Exact mouth shapes: Sync Lipsync 3 (photo or video). - Long talks and lessons: Kenerate Avatar or InfiniteTalk, up to 10 minutes. - Two people in one shot: an InfiniteTalk Duo or LongCat Duo engine. - A different emotion on existing footage: Sync React-1. - Short 1080p social clips: LTX 2.3 Lipsync. ### Lip sync, dubbing and talking photos Dubbing replaces the voice, lip sync moves the mouth, and a talking photo is lip sync applied to a still image. For a translated video you usually need both: dub first, then run video lip sync on the new track. ## FAQ Q: What is lip sync AI? A: Lip sync AI makes a face's mouth move in time with an audio track. It either animates a still photo into a talking video or redraws the lips on an existing video, so a new voice, a translation or a song looks like the person is really saying it. Q: Can I lip sync a photo? A: Yes. Use Avatar Talk in photo mode: upload a front-facing image and an audio file, and one of 19 engines turns it into a talking video. Paintings, cartoons and 3D characters work as long as the face is clear. Q: Can lip sync AI make a character sing? A: Yes. The engines follow whatever audio you give them, so a song works like speech. Use a clean vocal without loud music under it; OmniHuman 1.5 is a good choice for expressive singing clips up to 60 seconds from a photo. Q: Can I use my own voice? A: Yes. Upload a recording, record it with the mic inside Avatar Talk, or write a script in Voice Studio and pick the generated take from History. The lips follow your exact audio. Q: Is there a free lip sync AI? A: Avatar Talk works on the free plan with the sign-up credits, in both photo and video mode, so you can test a short clip before buying anything. Longer or higher-resolution videos use more, and one-time credit packs top it up. Q: Which lip sync AI is the most accurate? A: For mouth shapes that must match the words exactly, Sync Lipsync 3 from Sync Labs, which runs in both photo and video mode. In video mode it also lets you choose what happens when the clip and the audio differ in length. Q: Does lip sync AI work in any language? A: Yes. The engines follow the sounds in the audio, not the words, so any spoken language works. To translate a video, dub it first and then lip sync the dubbed audio, as the demo above shows. Q: Is it okay to lip sync someone else's face? A: Only with their permission. Use your own face, characters you created, stock presenters, or people who agreed to it, and never use lip sync to put words in a real person's mouth to mislead. ## Related pages - AI lip sync generator: https://kenerateai.com/ai-lipsync-generator - Talking photo AI: https://kenerateai.com/talking-photo-ai - AI talking avatar: https://kenerateai.com/ai-talking-avatar - AI video translator: https://kenerateai.com/ai-video-translator-and-dubbing - Make a photo talk: https://kenerateai.com/make-photo-talk ## Sources - Kenerate Avatar Talk: https://kenerateai.com/app/avatar-talk - Kenerate Voice Studio: https://kenerateai.com/app/voice - Sync Labs — lipsync models: https://sync.so/docs/models/lipsync - ByteDance — LatentSync: https://github.com/bytedance/LatentSync