Is the AI video dubbing tool free?

Yes. You can dub from text or audio without an account, and outputs carry no watermark. Free text supports 133 characters and free audio supports 20 seconds; downloads require a free sign-in and use a low-resolution copy unless unlocked with a Pro Video.

Does it translate the video for me?

No. Translate the dialogue first, then paste the translated script in Text mode or provide the finished performance in Audio mode. The page creates or accepts the new speech and re-syncs the mouth while you stay in control of translation quality.

What makes this better than a plain voice-over?

A voice-over leaves the lips moving to the original language, which viewers notice immediately. Re-syncing the mouth to the dub makes the video look natively filmed in the target language.

What file formats are supported?

Video: MP4, MOV, WebM. Audio mode: MP3, WAV, M4A, AAC, OGG, FLAC, or a browser recording. Text mode accepts a translated script plus a preset or cloned voice.

What are the text and audio limits?

Text supports 133 characters on Free, 800 on Starter, and 16,000 on Pro. Audio supports 20 seconds on Free, 3 minutes on Starter, and 60 minutes on Pro.

Can I keep the original speaker's voice in the new language?

Yes. In Text mode, clone the speaker from a short clean sample, paste the translated script, and generate the dub in that voice directly on this page.

Free Tools

AI Video Dubbing Tool

Upload a talking video, then paste translated text or add dubbed audio to re-sync the lips to the new language.

Free
No sign-up
No watermark

What this tool does

Upload a talking video, then paste translated text or add dubbed audio to re-sync the lips to the new language. It accepts both typed text with a preset or authorized cloned voice and uploaded or browser-recorded audio. The result is a watermark-free lip-sync video; Free accepts 133 text code points or 20 seconds of audio.

Recent Generations

You don't have videos yet. Start now. It's free & easy.

Upload Audio

Upload audio or record with microphone.

Upload Audio File

MP3, WAV, M4A, WEBM

Current plan limit: 20 seconds

AI Video Dubbing Tool

Tutorials

How to Dub a Video with AI Lip Sync

Source Materials

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Generation

Unedited Spanish dubbing result

A direct generation with no manual mouth retiming or post-production replacement.

Dubbing that matches the lips

Voice-over alone looks off — re-synced mouths make the dubbed take feel filmed in that language.

Start from text or a dub track

Paste translated dialogue and choose a voice, or use a voice actor's finished recording.

Localize once, publish everywhere

Turn one source video into native-feeling versions for each market and channel.

How to dub a video with matching lips

1
Upload the source video
Add an MP4, MOV, or WebM clip with one clearly visible speaking face. The original speech track will be replaced.
2
Choose text or audio
Paste the translated script and choose or clone a voice, or upload or record the finished dub track. Free text supports 133 characters and free audio supports 20 seconds; paid plans raise both limits.
3
Generate
The page creates speech from text when needed, then re-syncs the speaker's mouth to the new language frame by frame so the dub looks filmed rather than voiced over.
4
Review and download
Compare against the original in the browser and download the watermark-free dubbed video after signing in.

What people make with it

Multilingual marketing videos

Ship the same founder update, ad, or product tour in every market's language with lips that match.

Course and training localization

Dub lessons and onboarding videos so international teams and students get a native-feeling version.

Creator channel expansion

Publish existing YouTube or TikTok content into new language markets using a translated voice track.

Replacing scratch audio

Swap placeholder narration for the final studio take and keep the on-camera delivery in sync.

Inputs that produce better results

Start with a readable face

Use a continuous clip with one front-facing speaker and prepare a reviewed translation whose spoken duration is close to the source.

Use clean speech

Reduce music, echo, clipping, and long ambiguous silence. Match the delivery to the intended expression.

Test a short line first

A controlled phrase makes timing, mouth closure, and source problems easier to diagnose before a longer render.

Limits and unsupported cases

The tool does not translate or rewrite automatically; several speakers, cuts, occlusions, and large duration mismatches reduce quality.
The generator changes visible speech. It does not automatically translate, fact-check, caption, or edit the surrounding scene.
A generated result still needs human review before publication, especially when identity, language, or sensitive context matters.

Rights, consent, and disclosure

Use authorized footage and voices, and disclose altered dialogue whenever viewers could mistake it for an authentic recording.
Only upload faces, voices, music, and scripts you own or have permission to use.
Clearly label synthetic or altered media when viewers could otherwise believe it is authentic.

Pricing is per result, not per minute

Free generation deducts no Pro Video and outputs are watermark-free, subject to the free sign-in and resolution rules. Starter uses one Pro Video for one high-resolution result instead of charging credits for every second or minute. An active Pro subscription includes unlimited Pro Video generation entitlement.

The 2026 AI video pricing report calculates about $0.25 per effective Starter output minute when all 20 included results average one minute. This is comparison math, not FreeLipSync's billing unit.

2026 AI Video Pricing Report