Is audio-to-video lip sync free?

Yes. You can generate without an account and there is no watermark. The free tier accepts up to 20 seconds of audio per generation; downloads require a free sign-in and use a low-resolution copy unless unlocked with a Pro Video.

What audio formats can I upload?

MP3, WAV, M4A, AAC, OGG, and FLAC are supported, and you can also record audio directly in the browser. Video uploads accept MP4, MOV, and WebM.

How long can the audio be?

Up to 20 seconds on the free tier, up to 3 minutes on Starter, and up to 60 minutes on Pro — the limit applies to the uploaded or recorded audio track.

Does the original video audio get kept?

No — the tool replaces the speech in the video with your new audio and re-syncs the lips to it. Keep a copy of the original file if you need the old track.

Will the output have a watermark?

No. Every plan produces watermark-free video. Free downloads are low-resolution; original resolution unlocks with a Pro Video or a paid plan.

Can I dub a video into another language?

Yes. Upload the translated voice track (or record it) and the lips re-sync to the new language. For a text-first workflow, use the text-to-video lip sync tool instead.

Free Tools

Audio to Video Lip Sync

Upload a face video, add an audio file or recording, and sync the mouth movements to the new performance.

Or try a video sample:

Speech Audio

Upload audio or record with microphone.

Upload Audio File

MP3, WAV, M4A, WEBM

Current plan limit: 20 seconds

Preview area

Recent Generations

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Powered by FreeLipSync proprietary engine

Audio to Video Lip Sync

Tutorials

More

Replace Video Speech with Uploaded Audio

Source Materials

Generation

Generated result

The source clip after lip sync is retimed to the uploaded replacement audio.

Match a new take to video

Use a recorded voiceover, podcast clip, or final mix and sync it to an existing face video.

Upload or record in one place

Bring in finished audio files or capture a fresh take with the microphone workflow.

Useful for reels, training, and edits

Update promos, lessons, interviews, and short-form content without reshooting video.

How to sync audio to a video

1
Upload a face video
Add an MP4, MOV, or WebM clip with one clearly visible face. The original audio track will be replaced.
2
Add the new audio
Upload an MP3, WAV, M4A, AAC, OGG, or FLAC file, or record directly in the browser. Free accounts support up to 20 seconds of audio; Starter allows 3 minutes and Pro 60 minutes.
3
Generate
The engine matches the mouth movement to the new audio frame by frame.
4
Preview and download
Check the result in the browser and download a clean, watermark-free video after signing in.

What people make with it

Professional dubbing

Replace a video's dialogue with a studio-recorded or translated track and keep the speaker's lips in sync with the new audio.

Podcast and interview clips

Pair strong audio moments with existing footage of the speaker to cut social clips without filming new video.

Music and meme edits

Sync any voice line or vocal track to a face video for entertainment formats and reaction content.

Fix bad recordings

Rescue footage with unusable audio by re-recording the line cleanly and syncing it back onto the original take.