AI video dubbing

AI Video Dubbing Online

Give your video a voice in another language. Generate AI dubbing and subtitles, keep the background sound, and download the finished video.

10 free points · No credit card · First 30 seconds on Free

Upload a video to dubDrop a local file here or choose one from your device.MP4 · MOV · WebM · up to 2 GB

Estimated point cost shown before you startOpen the AI dubbing studio

Upload only video you own or are authorized to translate and dub.

AI video dubbing preview

Demo

69Target languages: Choose a language and regional voice locale in the studio.
10Free points: New accounts can start without entering a credit card.
30 secFree-plan video: The free plan translates the first 30 seconds.
2 GBMaximum file size: Upload local MP4, MOV, or WebM video.

Video dubbing

What is AI video dubbing?

AI video dubbing translates the speech in a video and generates a new voice track. UnmarkAI combines that voice with your video and provides translated subtitles and a separate audio file.

Dubbing lets viewers listen in their language. Subtitles let them read the translation, including when the sound is off. You can include both in the same video.

How it works

How to dub a video with AI

Upload the video, choose a language and voice settings, then listen to the finished result.

Start AI dubbing free

01
Upload and choose a language
Add an MP4, MOV or WebM video up to 2 GB. Confirm its original language, then select the languages you need.
Video selected
02
Choose voice and review settings
Choose standard or advanced quality. Turn on manual review if your plan includes it, so you can correct the text before dubbing.
Settings confirmed
03
Generate the dubbing
Start the task after checking the point estimate. If manual review is on, correct the transcript and translation when the task pauses, then continue.
Dubbing generated
04
Listen and download
Check pronunciation, pauses and background sound. Download the dubbed video, subtitle files and voiceover audio.
Ready to download

Review example

Check names and wording before dubbing

This example shows the kind of lines to check during manual review. Eligible plans let you pause after transcription and translation, correct the text, and continue.

UnmarkAI

Review example

AI DUBBING / 01Check names and wording before dubbing

SourceEnglish · auto-detect

TargetSpanish · Mexico

Text review2 / 2

Speaker 100:04

Welcome to the product walkthrough.

Te damos la bienvenida a la demostración.

Speaker 100:09

Keep names and key terms consistent.

Mantén coherentes los nombres y términos clave.

Dubbing options

Choose the voice, captions and background sound

Start with standard quality, or use the advanced options included in your plan.

Voice

Similar voice or voice cloning

Standard quality uses a similar voice in the target language. Advanced Quality offers source-speaker voice cloning on eligible plans.

Get the speaker’s permission before cloning their voice.

Review

Correct the text before dubbing

Pause to check the original transcript and translation. Correct names, numbers and unclear phrases before continuing.

Manual review requires an eligible plan.

Audio

Keep music and ambient sound

Keep the background sound underneath the new voiceover. Listen to the result to check that the speech is clear.

Background audio preservation is included by default.

Downloads

Video, subtitles and audio

Download the dubbed MP4, original and translated SRT files, and voiceover MP3. You can also show translated subtitles in the video.

Choose caption settings before you start.

Use cases

Dub tutorials, product videos and interviews

Dubbing is useful when viewers need to follow spoken instructions or a conversation. Add captions for those watching without sound.

Creators

YouTube and social video

Localize videos from your own channel for new language audiences without recording every version again.

Education

Courses and tutorials

Review technical vocabulary before generating a clear target-language narration for each lesson.

Marketing

Product demos and launches

Keep product names, claims, and calls to action consistent across localized video releases.

Teams

Interviews and training

Check speaker changes, names, pacing, and pronunciation before publishing a reviewed version.

Quality review

Listen for the details that change the meaning

A clear voice can still read a wrong name or number. Use manual text review on eligible plans, then listen to the finished video to check pronunciation and timing.

Names and numbers

Compare names, quantities and technical terms with the source.

Natural phrasing

Check whether the translated lines sound like speech and fit the available time.

Sound and captions

Listen to speaker changes and music levels. Check that captions appear at the right moment.

TRANSCRIPT / REVIEWText review example

2 lines need attention

00:04–00:08

Welcome to the product walkthrough.

Te damos la bienvenida a la demostración.

Approved

00:09–00:14

Keep SKU names exactly as written.

Mantén los nombres de SKU tal como aparecen.

Check term

00:15–00:20

Export one version for each market.

Exporta una versión para cada mercado.

Approved

Choose the right output

AI dubbing, subtitles, or a studio recording?

Subtitles, AI voices and recorded performances suit different videos. Use the amount of acting and direction you need to guide your choice.

Need	Subtitles	AI dubbing	Traditional dubbing
Viewer experience	Read the translation	Hear an AI voice	Hear a recorded performance
Useful for	Sound-off viewing	Tutorials and frequently updated videos	Scenes needing directed acting
Check before publishing	Translation and caption timing	Wording, pronunciation and timing	Performance, timing and mix
Production steps	Prepare and time captions	Upload, translate, review and download	Cast, record, edit and mix

FAQ

AI video dubbing questions

Find out what the free trial includes and how voices, subtitles and review work.

01Can I dub a video online for free?

Yes. New accounts receive 10 free points and no credit card is required. On the free plan, the first 30 seconds of a video are translated. The studio shows the point estimate before you start.

02Which video formats and file sizes are supported?

Upload a local MP4, MOV, or WebM file up to 2 GB. Use only video you own or are authorized to translate and dub.

03How many languages can I dub a video into?

The current translation workflow includes 69 target languages, with regional locale choices for languages such as English, Spanish, Portuguese, French, and Arabic.

04Can UnmarkAI clone the original speaker’s voice?

Advanced Quality can clone the source speaker for members. Standard quality uses a similar target-language voice. Only clone a voice when you have the speaker’s permission and the necessary content rights.

05How is AI dubbing different from subtitles?

Subtitles translate written text while preserving the original audio. AI dubbing generates translated speech so viewers can hear the content in their language. You can use both for accessibility and sound-off viewing.

06Can I remove burned-in subtitles before dubbing?

Eligible plans can clean authorized burned-in captions before the localized video is rendered. Review cleaned frames carefully, especially over movement and detailed backgrounds.

07What permission do I need for AI dubbing?

You are responsible for having permission to translate the video, publish the localized result, and use any cloned voice. Requirements vary by contract and jurisdiction, so confirm rights for third-party talent or licensed footage.

Free to try

Dub the first 30 seconds of your video

Upload a video and check the estimate. New accounts receive 10 free points; the free plan processes the first 30 seconds.

Last updated: September 5, 2026