How to dub a video into another language with AI

To dub a video into another language, upload the video, choose the target language, and let an AI voice re-narrate it. With ScreenDub you can dub a screen recording or an uploaded file into 80+ languages with natural voices. It transcribes the original, translates the script, and voices it in the new language, with the timing kept close to the source. There are no voice actors to hire and no studio to book, and the whole thing runs in your browser. This guide walks through the full workflow, a worked example in two languages, what separates a good dub from a rough one, and the mistakes that quietly ruin most translated videos.

Why AI dubbing beats subtitles and re-recording

Subtitles ask the viewer to read and watch at the same time, so attention splits and small text on screen gets missed. Dubbing puts the message back into spoken audio, so people keep their eyes on the product or the slides while they listen. It reads as more produced, and it reaches viewers who would never sit through a wall of captions in a language that is not their own.

Re-recording the video from scratch in each language is the other option, and it is the expensive one. You would need a speaker for every language, a quiet room, and a fresh take of every screen, then you would have to edit each version to match. Dubbing skips all of that. The visuals stay exactly the same, so one recording becomes as many language versions as you need without shooting anything twice.

Because the script stays editable, you are not locked into a rough machine translation. You clean up the wording, fix product names and industry terms, and only then voice it, so the dubbed version sounds like something a person wrote rather than something a machine guessed.

What you need

• A free account. No credit card is needed to start.
• The source video as an MP4, WebM, or MOV file.
• The languages you want to reach, and the right terms for each if your field is technical.
• A recent version of Chrome or Edge, since the whole workflow runs in the browser.

How to dub a video, step by step

1. Bring the video. Upload an MP4, WebM, or MOV. The source can be a demo, a tutorial, a webinar, or a talk. Files can run up to 6 minutes on the free plan, up to 15 minutes on paid plans, and up to 650 MB, so most single videos fit without trimming.
2. Review the script. ScreenDub turns the spoken content into an editable transcript. Fix any mistakes here first, because a clean source makes a cleaner translation. This is the step most people skip and later regret. A misheard product name or a dropped word in the original will carry into every language you export.
3. Pick the language. Choose from 70+ languages. The script is translated and the timing is matched to the original, so the new narration lands where the old one did. The visuals do not change, which is what keeps the dub in step with what is happening on screen.
4. Choose the voice. Pick a voice and accent for the new language, then preview it against the footage. Swap it if the tone does not fit the content, or record your own microphone if you would rather use a real voice for one of the versions.
5. Export. Render the dubbed video to a finished MP4. You also get translated subtitles and a transcript from the same project, and you can repeat for every other language you need without starting over.

A worked example: one product video, two languages

Say you have a two-minute product video in English and you want to ship it in Spanish and Hindi for two new markets. Here is how it comes together from a single project.

1. Upload the finished English MP4. ScreenDub transcribes the narration into an editable script.
2. Read the transcript against the video and fix the two spots where it misheard your feature names. This clean source is what both translations will be built from, so it is worth the two minutes.
3. Choose Spanish. The script translates and the timing stays matched to the original, so the new narration tracks the same on-screen moments. Pick a warm voice that suits marketing, preview a line or two, and export the Spanish MP4 with its subtitles.
4. Come back to the same project, switch the target to Hindi, choose a voice, and export again. The visuals never moved, so the Hindi version lines up just like the Spanish one did.

The result is three versions of one video, in the time it used to take to book a single voice session. The same recipe scales to as many languages as your markets need.

What makes a good dub

A dub is not judged by how fast it was made, but by whether a native speaker forgets they are watching a translation. The good ones share a few habits.

• Clean the source script first. Every error in the original carries into the translation. A few minutes fixing the transcript saves rework in every language.
• Keep the timing matched. The new narration should land on the same on-screen moments as the original. Adjust a line if a translation runs long or short, so the audio never drifts away from what the viewer is looking at.
• Lock your terms. Decide how product names, features, and jargon should read in each language and keep them consistent, rather than letting them drift line to line.
• Match the voice to the content. A calm, even voice suits a tutorial; a warmer one suits marketing. Preview before you render so the tone fits.
• Mind the phrasing, not just the words. A literal translation can read stiff. Adjust the wording so it sounds like how people actually speak in that language.

Common mistakes to avoid

• Translating before fixing the source transcript, so every error spreads into each language.
• Letting product names and key terms change from line to line instead of locking them.
• Picking the first voice without previewing it against the footage and the tone of the content.
• Ignoring lines that run long after translation, so the audio drifts out of step with the video.
• Treating dubbed audio and captions as either-or, when layering both reaches more viewers.
• Shipping one language and stopping, when the same project could cover every market at once.

Inputs

MP4, WebM, or MOV files

Languages

70+, with natural voices and accents

Limits

6-15 minutes by plan, up to 2K, files up to 650 MB

You get

A dubbed MP4, subtitles, and a transcript

Free plan

10 minutes of export a month, no card

Subtitles, transcripts, and many languages from one project

The dubbed MP4 is not the only thing you leave with. The same project gives you translated subtitles and captions so the video works with the sound off, and a transcript you can reuse for a blog post, a help doc, or a search-friendly page. You can add chapters so viewers jump to the part they need, and background music if the silence feels flat. Because the narration starts as editable text, none of this means touching the original footage.

Dubbing vs adding a voiceover

Dubbing replaces the spoken audio of a video with the same message in another language, keeping the timing matched to the original. Adding a voiceover is about giving a video a narration track in the first place, often on footage that had none, or replacing a narration in the same language. The workflow overlaps, but the intent differs. If you are not translating and simply want a clear spoken track over your video, read how to add an AI voiceover to a video instead.

Frequently asked questions

Dub your first video free. Get started with 10 minutes of export a month, learn more about video dubbing and translation, or see how to add an AI voiceover to a video next.