Use cases
Pick the job. Then bring your video and audio.
Every workflow starts with an existing single-speaker video and replacement audio you are allowed to use. Choose the closest job to see the proof and what to prepare.
Use cases
What do you need to update?
Each guide shows a finished example, the right inputs, and the limits of this tool before you upload.
Use caseChange 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Got one outdated number, name, date, or sentence in an otherwise good recording?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 the guide
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date, product name, or offer changes after filming, a new audio line can keep a usable presenter segment from becoming outdated.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 the guide
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 the guideUse 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 the guideThe presenters in these examples are AI-generated. The guides show lip matching, not avatar creation.
Already have both files?
Go straight to the uploader.
No scenario selection required. Upload your video and replacement audio when you are ready.