AI Lip Sync Video Generator | Sync Any Video to Audio

Use AI lip sync to match any video to new audio. Upload your footage with an MP3, WAV, or typed script, and HeyGen redraws the speaker's mouth to fit every word, in any language.
A wrong line used to mean booking the presenter and reshooting. Upload the original MP4, MOV, or WEBM, add a corrected MP3, WAV, or typed script, and the model redraws the mouth frame by frame. Short clips come back in two to five minutes.
Re-recording a voiceover for every new market multiplies cost and turnaround. Clone your voice from a 15-second sample with voice cloning, translate the script into 175+ languages and dialects, and every translated version is lip synced in your own tone.
Some projects start with no footage at all. Upload one portrait plus an audio file or script, and the AI photo avatar animates the face with matched lips, head motion, and expression. A headshot becomes a talking or singing video without a camera crew.
Basic lip sync drifts the moment a speaker turns, a microphone covers the mouth, or the camera cuts away. Precision mode tracks speaker switches, angle changes, and side profiles, and syncs every visible face, so interviews and panel footage stay usable.
When no presenter is available, pick one of 1,100+ stock avatars or Avatar V to deliver the script. Custom Motion takes prompts for gesture, posture, and expression, so the same script can read as a calm explainer or a punchy social hook.
A localization manager with dubbed tracks from voice actors uploads each one against the original video. HeyGen redraws the speaker's mouth for every language, so dubbed versions look native instead of visibly out of sync.
A sales rep records one take, then swaps the prospect's name, company, or offer using variables from a Google Sheet or HubSpot. Each personalized video renders with matched lips, hundreds per campaign.
A YouTube creator posting weekly in English pastes each link into the video translator, picks up to 10 languages, and publishes native lip-synced versions with a cloned voice and captions the same day.
An L&D manager reissues a compliance module whenever a policy changes. They edit the affected paragraph in the script, regenerate it with lip sync, and republish without booking talent or studio time again.
A performance marketer running one UGC hook across regions dubs each variant into the local language with matched lips, or generates the creator with Veo 3.1 or Seedance 2.0 inside HeyGen and lip syncs that.
A product marketer publishing daily demos picks a stock avatar, pastes the day's script, and generates. When a feature changes, they edit one line and regenerate, and the avatar's lips match the new wording.
Four steps, from a video or a single photo plus audio. Short clips render in two to five minutes.
Add an MP4, MOV, or WEBM up to 5 GB, paste a YouTube or Google Drive link, or upload a single photo. HD is the default, with 4K for final cuts.
Upload an MP3 or WAV, type a script for AI narration, or use your cloned voice.
Speed suits front-facing, single-speaker clips. Precision handles side profiles, several speakers, and hands or microphones near the mouth.
Check the sync, adjust timing, and export an MP4 in 16:9, 9:16, or 1:1 for social, your LMS, or your team.
AI lip sync is a video technique that uses machine learning to match a speaker's mouth movements to an audio track. The model splits the audio into phonemes, maps each sound to a mouth shape, and re-renders the face frame by frame, so new or translated speech looks naturally spoken.
Yes. The Free plan includes 1 to 3 videos (varies by region), up to one minute each, with 720p sharing and a HeyGen watermark, and no credit card is required. Paid plans remove the watermark, allow 30 or 60 minutes per video, and add 1080p and 4K export.
Upload a video or photo, then add the new audio as an MP3 or WAV file, or type a script and pick an AI voice. Choose Speed or Precision mode and generate. HeyGen re-renders the mouth to match and returns an MP4 you can preview and download within minutes.
Many lip sync tools only match a mouth to audio you already have. HeyGen can also create that audio from a script, your cloned voice, or a translation into 175+ languages, then sync it in the same job. Speed and Precision modes let you match the cost to how difficult the footage is.
Yes, for most footage. Results are cleanest when the speaker faces within about 45 degrees of the camera, stands within 10 feet, and is evenly lit. For side profiles, speaker switches, or hands and microphones near the mouth, use Precision mode, which is built for that footage.
Both run the same lip sync engine. Speed costs 6 credits per minute and suits front-facing footage with one speaker. Precision costs 10 credits per minute and handles side profiles, camera-angle changes, speaker switches, and objects in front of the mouth. Start with Speed and switch if the sync drifts.
Yes. When you upload your own audio, the lip sync engine maps mouth shapes to sounds rather than words, so any language, dialect, or accent works. If you type a script instead, AI voices cover 175+ languages and dialects.
Length depends on your plan, from one minute on Free to 30 minutes on Creator and Pro, 60 minutes on Business, and 5 hours on Enterprise. Videos export as MP4 in 16:9, 9:16, or 1:1, so they fit TikTok, Reels, Shorts, and YouTube, at up to 4K on Pro and above. Add synced captions with the subtitle generator.
With AI dubbing, HeyGen transcribes the speech, translates it, and regenerates it in the speaker's own voice. Dynamic Duration stretches or compresses each line by up to 20% to fit the original timing, then the lips are re-rendered to the new words. Würth Group shipped a 65-minute presentation in eight languages in four days and cut translation costs by 80%.
Yes. Clone your voice from a 15-second sample and use it on any script, in any language. Voice cloning requires consent from the voice owner. Uploaded footage is hosted on AWS in the US, never shared with