AI lip sync for a corrected line
Change words in a video — without changing the take.
Got one outdated number, name, date, or sentence in an otherwise good recording? Bring a replacement audio line and match the mouth to it.
Try the free previewBring an audio track you own. No account required for the free preview.
What the sample proves
A one-word change should be obvious.
Switch between the two finished versions. The on-screen captions show the exact word that changed, even with sound off.
Three steps
Bring the inputs. Keep control of the words.
Keep the usable take
Choose a clear, single-speaker clip you have the right to use.
Record the new line
Upload a clean MP3, WAV, or M4A with the wording you need.
Generate and check
Preview the matching mouth movement, then download the MP4.
A good fit
Use it when
- Correcting a version number, date, name, or short statement
- A clear face looking toward camera
- A replacement audio line that fits the source clip
Keep in mind
Not the right tool for
- Typing a new script without providing audio
- Multiple people speaking in one clip
- Changing someone’s words without permission
Use cases
Find the right starting point
Every workflow starts with the same two inputs: one clear speaker and audio you are authorized to use.
Change words in a video
Got one outdated number, name, date, or sentence in an otherwise good recording? Bring a replacement audio line and match the mouth to it.
See how it works Use caseUpdate a product demo video
When a launch date, product name, or offer changes after filming, a new audio line can keep a usable presenter segment from becoming outdated.
See how it works Use caseReplace a video voiceover
LipSync is for the point after you already have both inputs: an existing talking video and a new, authorized voice track that should appear to be spoken on camera.
See how it works Use caseLip sync an AI presenter video
If you already have a clean, single-speaker AI presenter video, you can bring it together with approved replacement audio. LipSync does not create the presenter or the voice.
See how it works