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01Source video

Upload a video

MP4, MOV, WebM · max 300MB · short side ≤ 1080px

02Voice track

Upload audio

MP3, WAV, M4A · max 100MB

03Video mode
—Cost: —

AI Lip Sync Generator

Upload a video and an audio track, and AI re-syncs the on-camera speaker's mouth to the new voice. Built for dubbing, voiceover fixes, and localized clips.
AI Lip Sync Generator created with AvatarCraft AI

How to Get a Cleaner Lip Sync

Start with a clear source video

Upload a clip where the speaker's face stays visible throughout. The short side must be 1080px or less and the file up to 300MB. Steady framing and an unobstructed mouth give the model the best reference.

Start with a clear source video

Bring the audio you want to hear

Upload the finished speech, dialogue, or singing track — at least one second long and up to 100MB. This tool syncs to the audio you supply; it does not translate the dialogue or generate the voice for you.

Bring the audio you want to hear

Choose normal or loop

Normal plays the video once and trims audio that runs past the end. Loop repeats the video until the audio finishes. Estimated output is capped at 120 seconds either way.

Choose normal or loop

Review before you publish

Check mouth timing on hard consonants first, then confirm you hold the rights to both the footage and the voice. The tool changes the mouth; responsibility for the message stays with you.

Review before you publish
Use Cases

AI Lip Sync Generator Use Cases

Use this when the footage is already right and only the audio needs to change.

Voiceover corrections

Fix a misread line or an outdated figure without reshooting — re-record the audio and re-sync the same take.

Localized versions

Supply a translated voice track for a new market and keep the same on-camera presenter across every language.

Social re-edits

Refresh a clip for another campaign or platform by swapping the audio instead of producing new footage.

Inputs, limits, and rights

What This Lip Sync Tool Does — and Does Not Do

Video requirements

A clip whose short side is 1080px or less, up to 300MB. One clearly visible face throughout works best.

Audio requirements

At least one second long, up to 100MB. Bring the finished track — the tool syncs to it rather than generating it.

Output length

Estimated output is capped at 120 seconds. In normal mode the length follows the shorter of the video and the audio.

Playback mode

Normal plays the video once; loop repeats it until the audio ends. Pick the one that matches your track length.

One audio track at a time

The workflow syncs a single audio track to the footage. It does not separate or assign multiple speakers in one scene.

Footage and voice rights

Only upload video and audio you own or are authorized to use, and only use a real person's voice with their consent.

How to Lip Sync a Video with AI

Three steps: source video, new audio, generate
01

Upload the source video

Choose a clip where one speaker's face is clearly visible. The short side must be 1080px or less, and the file up to 300MB.

02

Upload the new audio

Add the speech, dialogue, or singing track you want the speaker to deliver. Minimum one second, maximum 100MB.

03

Pick a playback mode and generate

Choose normal or loop, generate, then review the mouth timing before exporting. Estimated output is capped at 120 seconds.

Start Creating

Why Creators Use AI Lip Sync Generator

Keep the take, change the words

Useful when reshooting is expensive and the script changes more often than the setting or the presenter.

Normal or looped playback

A short piece of footage paired with a longer voiceover is the case loop was built for.

Priced by output length and resolution

A shorter audio track or a lower-resolution source costs less to generate.
Common questions about creating a lip sync video with AvatarCraft AI.

AI Lip Sync Generator FAQ

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