AI video translator: speech recognition, translation and a natural voice

An AI video translator does three things a caption file cannot: it listens to the actual speech, translates meaning rather than words, and speaks the result in a natural voice. TranslateTube does all three for any YouTube video, in your browser or on your phone.

How the AI works

1. Speech recognition turns the audio into text with timestamps, so videos without captions can be translated.
2. Translation by a large language model keeps sentence meaning, idioms and tone.
3. Voice synthesis speaks the translation with a natural male or female AI voice, timed to the original.
4. Sync: everything plays over the original video; the original audio stays available.

How it works

1. Install the TranslateTube Chrome extension on a computer, or the Android app on your phone.
2. Open any YouTube video and choose your language.
3. Turn on AI dubbing, subtitles, or both. Pick a male or female voice.
4. Press play. The translation starts within seconds and stays in sync with the video.

Free to use

The free mode has no minute limit and no daily cap. The only restriction is on videos longer than three hours. Premium adds higher-quality voices. One subscription works in the extension and the app.

What it is good for

• Lectures, courses and conference talks in another language.
• Tutorials and product demos from creators who do not publish in your language.
• Interviews, podcasts and vlogs you want to listen to rather than read.
• Language learning: original audio with translated subtitles, or the reverse.

Frequently asked questions

What is the difference between an AI video translator and YouTube auto-translate?

YouTube auto-translate only translates an existing caption track into text. An AI video translator recognizes the speech itself and can produce a spoken translation, so it works on videos with no captions.

Is the AI voice natural?

The free mode uses a clear standard voice. Premium adds higher-quality, more natural voices.

Is it free?

Yes, the free mode has no minute limit. Only videos longer than three hours are restricted.

Which videos does it work with?

YouTube videos, with or without captions. Support for other sources is planned.

Tips and updates: follow TranslateTube on Telegram.

Learn more: video translator for YouTube · YouTube dubbing · how AI video translation works.