AI video dubbing

AI Video Dubbing Online

Dub videos with AI voices in 69 target languages. Upload MP4, MOV, or WebM up to 2 GB, review the transcript, and export a localized MP4 with subtitles.

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

Private upload · estimated cost shown before 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.

Direct answer

What is AI video dubbing?

AI video dubbing replaces a video’s original speech with a translated voice track generated by AI. The workflow transcribes the source audio, translates it for spoken delivery, generates the target-language voice, and renders a localized video.

Unlike subtitles, dubbing lets viewers hear the message in their language. Subtitles remain useful for accessibility and sound-off viewing, so many teams export both dubbed audio and translated captions.

How it works

How to dub a video with AI

The same four-step workflow works for creator videos, courses, product demos, interviews, and authorized episodic content.

Start AI dubbing free

01
Upload and choose the target language
Add an MP4, MOV, or WebM file, confirm the detected source language, and choose one of 69 target languages and its regional locale.
Source ready
02
Review the source transcript
Correct names, numbers, technical terms, and uncertain lines before translation. Member workflows can pause for manual review.
Transcript checked
03
Generate the translated voice
Use a standard similar voice, or enable Advanced Quality as a member to clone the authorized source speaker and improve transcription and translation quality.
Voice generated
04
Preview and export the localized video
Check pronunciation, line timing, subtitles, background audio, and the final MP4. Download supporting audio and subtitle files when available.
Ready to publish

Product workflow preview

Review the words before generating the voice

Inspect the source and translated lines, voice mode, background audio, and subtitle output before starting a task.

UnmarkAI

Product workflow preview

AI DUBBING / 01Review the words before generating the voice

SourceEnglish · auto-detect

TargetSpanish · Mexico

Transcript 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.

Product capabilities

AI dubbing controls you can verify in the studio

Each capability below maps to a current workbench control or output. Member-only options are labelled before the task starts.

Voice

Similar voice or authorized voice clone

Standard quality uses a similar target-language voice. Advanced Quality adds higher-accuracy processing and cloning of the authorized source speaker for members.

Voice cloning requires speaker permission.

Review

Edit the transcript before translation

Pause after transcription to correct uncertain words, names, and terminology before the translated voice is generated.

Manual review is a member control.

Audio

Preserve music and ambience

Separate speech from the source mix and keep approved background music or ambient sound in the localized result.

Background-audio preservation is included for everyone.

Delivery

Localized MP4, voiceover, and subtitles

Render the translated video and keep subtitle delivery in the same workflow. Burn translated captions into the MP4 when visible captions are required.

Available files depend on the completed task.

Use cases

Video dubbing for content people need to watch, not just read

Choose dubbing when the voice carries the explanation, personality, or instructions; keep translated subtitles alongside it for accessibility.

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

Fix the script before the voice is rendered

A natural-sounding voice cannot repair a wrong name or mistranslated claim. Review high-risk lines first, then check the finished audio against the video before publishing.

Transcript accuracy

Correct names, numbers, acronyms, and low-confidence words while the source video is visible.

Spoken translation

Shorten literal translations when needed so the meaning fits the available scene time.

Publishing QA

Check pronunciation, subtitle timing, background audio, output resolution, and file naming.

TRANSCRIPT / REVIEWSource transcript review

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?

The best format depends on how much the voice matters, how often the video changes, and how much human direction the production needs.

Need	Subtitles	AI dubbing	Traditional dubbing
Audience experience	Read translated text	Hear translated speech	Hear actor-directed speech
Best for	Sound-off and accessibility	Repeatable online localization	Performance-critical productions
Review focus	Translation and timing	Transcript, voice, and timing	Casting, direction, and mix
Typical workflow	Caption file or burn-in	Upload, review, generate, export	Studio booking and post-production

FAQ

AI video dubbing questions

Clear answers about the free plan, formats, languages, voice cloning, and content rights.

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

Create an account with 10 free points, upload an authorized video, and review the estimated cost before the task starts.

Last updated: August 2, 2026 · Product details checked against the current UnmarkAI workbench