AI Lip Sync & Dialogue Tool — Re-dub any performance so mouth shapes match the new audio — built for localisation and character animation.
What AI Lip Sync & Dialogue Tool does
Lip Sync & Dialogue solves the mismatch problem in multilingual video. When a clip is dubbed into another language, the original mouth movements no longer line up with the new words, and audiences notice immediately. This tool analyses the new audio, rebuilds the mouth shapes frame by frame, and preserves the original facial expression and head motion so the performance still reads as the same person.
Key features
- Frame-accurate mouth reconstruction from any audio track
- Expression and head-motion preservation, so personality survives the dubbing
- Multi-speaker detection for dialogue scenes with several people on screen
- Works on footage as well as generated avatars
- Side-by-side preview comparing the original and the new sync
- Batch mode for localising a whole series across languages
How it works
- Upload your video and the new dialogue audio.
- Let the tool detect speakers and align the timing.
- Preview the sync and adjust the timing curve if a line needs to land earlier or later.
- Render the final clip at full quality.
Who it is for
Localisation teams dubbing content for new markets, animation studios fixing lip sync in post, and creators translating their own catalogue into additional languages.
Why teams choose AI Lip Sync & Dialogue Tool
Most AI video tools optimise for a single impressive demo. AI Lip Sync & Dialogue Tool is built for repeatable output — the same settings produce the same quality on the hundredth export as on the first, and everything you create stays editable. That matters when a campaign needs twenty variants, when a client asks for one more revision, or when a series has to look consistent across a whole season of work.
It also fits into the rest of the OpenFilmo pipeline. Assets you create here can be finished with our other tools, and your brand kit carries through automatically so nothing leaves the studio off-brand. Commercial use is included on every paid plan, exports are watermark-free, and nothing you make is locked to a format you cannot change later. Start with a single render, or compare the plans on our pricing page.
Frequently asked questions about AI Lip Sync & Dialogue Tool
Does it work with more than one speaker?
Yes. Multi-speaker detection separates voices and syncs each face independently.
Will it change the person’s appearance?
No. Only the mouth region is reconstructed. Expression, lighting and the rest of the frame are untouched.
Can I use it on animated characters?
Yes. It works on rendered and hand-drawn animation as well as live footage.
What audio formats are supported?
WAV, MP3, AAC and M4A.
Related tools
- AI Voiceover & Dubbing Tool — Natural-sounding voiceover in more than 40 languages, with tone control and full dubbing that keeps the original performance.
- AI Talking Avatar Generator — Type a script and get a lip-synced presenter in more than 40 languages.
- AI Sound Design Studio — Layered ambience, foley and impact effects tuned to your edit.
Explore every tool in the suite on the OpenFilmo tools hub.