AI video dubbing that actually matches the lips
In short
TL;DR: most AI dubbing only replaces the voice — the mouth still speaks the old language, so it looks off. Fattly re-syncs the lips to the new language, so a dubbed clip looks like it was filmed that way.
Why most AI dubbing looks slightly wrong
You have seen it: a clip gets dubbed into your language, the voice is new, but the person's mouth is still forming English words. Your brain catches the mismatch in a split second, even if you cannot name it, and the video reads as fake. Most dubbing tools only swap the audio track. That is fine for a podcast, but for a talking-to-camera clip the lips give it away — and a video that looks off does not travel.
Real dubbing re-syncs the mouth, not just the sound
Proper AI dubbing does two things at once: it re-voices the clip in the target language with a natural speaker, and it re-animates the mouth so the lips match the new words. When both line up, a Polish viewer sees a person who looks like they filmed the video in Polish — no subtitles, no uncanny mismatch. That is the line between a clip people watch to the end and one they scroll past in the first second.
What good lip-sync dubbing needs
Before you trust any tool with your video, check whether it delivers these:
- Lip movement re-animated to match the new language, not just new audio
- A natural native voice, not a robotic text-to-speech read
- The person's face and delivery kept intact — only mouth and voice change
- Support for short vertical clips made for Reels, TikTok and Shorts
- Fast turnaround, so you localise a clip in minutes, not days
- Fair pricing, so testing a market does not cost a production budget
How Fattly dubs into Polish, German and Spanish
You upload a short clip, pick the target language, and Fattly re-voices it with a natural native speaker and re-syncs the lips to the new words. The person keeps their face and delivery — only the language changes. A clip you filmed in English can go out in Polish looking like it was shot that way, which is exactly what you need to reach a new market with content you already have.
It runs on the same platform as the rest of your content — 50+ AI models, pay-per-credit, credits that never expire and no mandatory subscription. Dubbing is not a separate plan; it is one more thing you do with the credits you already have.
| What to look for | Audio-only dubbing | Fattly |
|---|---|---|
| Lip movement | Stays on the original language | Re-synced to the new language |
| Voice | Often robotic text-to-speech | Natural native speaker (PL/DE/ES) |
| The person's look | Unchanged, but the mouth is off | Face kept, mouth matches the words |
| Best for | Podcasts, voiceover | Talking-to-camera clips and ads |
| Format | Any audio | Short vertical clips for the feed |
| Pricing | Separate subscription | Pay per credit, credits never expire |
Who uses it
Creators turning one reel into three markets; course and coaching businesses localising lessons; e-commerce brands dubbing a product demo for each country; and personal brands who film once in their strongest language and ship everywhere. Anywhere you have a good clip in one language and an audience in another, dubbing with real lip-sync lets you reuse it instead of reshooting.
Try it on one of your clips
Take a short video you already have, pick a language and dub it. On free credits you can see for yourself whether the lips actually match and whether the voice passes as native, before you build a workflow around it. Upload, choose the language, and watch the same clip come back speaking a new one.
Frequently asked questions
Does the mouth really match the new language, or just the audio?
The mouth is re-animated to match the new words, not only the audio. Most tools swap the sound and leave the lips on the original language, which reads as fake; Fattly re-syncs the lip movement so a dubbed clip looks like it was filmed in that language. You can check it on a short clip with free credits before committing.
How long a video can I dub?
Dubbing works best on short clips — the reels, TikToks and Shorts that make up most social content. Keeping clips short also keeps the lip-sync tight and the cost low, which is ideal for testing a market with content you already have.
Which languages can I dub into?
Fattly dubs into Polish, German, Spanish and English with a natural native voice and matching lip-sync. You can take one clip and send it to several markets by dubbing it into each language, without reshooting anything.
Do I need a separate subscription for dubbing?
No. Dubbing runs on the same pay-per-credit account as everything else on Fattly. Credits never expire and there is no mandatory subscription, so you dub with the credits you already have and only pay for what you use. You start with 10 free credits and no card.
Ready to try?
Try AI dubbing