Existing video, new speech

Replace a video voiceover and match the mouth to it.

UseLipSync starts with an existing talking video, then lets you supply new speech by typing with a selected or cloned voice, uploading audio, or recording it to appear spoken on camera.

Open Video Lip Sync

Bring an audio track you own. New sessions start with 500 credits; no account is required.

“The new checkout goes live on Friday.”

Line B selectedAI-generated presenter

What the sample proves

The audio drives the new mouth movement.

Both versions use the same presenter footage. Switch the line to see how new speech can change while the take stays intact.

Three steps

Bring the inputs. Keep control of the words.

Choose a talking-head clip

Use an MP4 or MOV with one visible, evenly lit face.

Define the new speech

Type text with a selected or cloned voice, record it, or upload clean MP3, WAV, or M4A audio without music or overlapping voices.

Create a lip-synced MP4

Speech length is limited by your credit balance, not by your plan — the same in every input mode.

A good fit

Use it when

An approved revised voice track
Clear speech with no background music
A source video at least as long as the new audio

Keep in mind

Not the right tool for

Translating or writing a script for you
Music videos, animals, or heavily hidden faces
A source clip shorter than the needed performance

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.

Use case

Change words in a video

Got one outdated number, name, date, or sentence in an otherwise good recording? Type the corrected line, upload it, or record it — then match the mouth to it.

See the guide

Use case

Update a product demo video

When a launch date, product name, or offer changes after filming, a new line you type, upload, or record can keep a usable presenter segment from becoming outdated.

See the guide

Use case