YouTube Gemini

Translate YouTube, Vimeo, and Udemy subtitles in real time using Google Gemini.

Translate YouTube, Vimeo, and Udemy subtitles in real time with Google Gemini. Watch videos in other languages with high-quality subtitles in your preferred language. ■ Features • Real-time AI translation of existing YouTube, Vimeo, and Udemy subtitles with the Gemini model you choose. • 17 target languages: Korean, English, Japanese, Chinese (Simplified and Traditional), Spanish, French, German, Italian, Portuguese, Russian, Vietnamese, Thai, Indonesian, Arabic, Hindi, and Turkish. • Dual subtitles: show the original and translation together, useful for language learning. • Supports auto-generated subtitles (ASR), not only manually created caption tracks. • In-player panel: change model, language, and font size without leaving the video. • Translated transcript viewer: read and copy the full translated transcript. • Smart caching: the same video is not translated again, helping avoid duplicate API costs. • Vimeo support: works on vimeo.com and embedded Vimeo players on other websites. • Udemy support: works on Udemy course pages, including Udemy Business. ■ How to use 1. Click the extension icon and paste your own Gemini API key. You can get a key at https://aistudio.google.com/apikey. 2. Choose a target language and Gemini model, for example gemini-3.5-flash. 3. Play a YouTube, Vimeo, or Udemy video. Translated subtitles appear automatically. ■ Your models, your control • Choose any Gemini model your account can access, such as gemini-3.5-flash, 2.5-pro, 2.5-flash, 2.0-flash, 1.5-pro, or 1.5-flash. • Use Refresh model list to load the latest models directly from the Gemini API. • Customize the translation system prompt from the options page. ■ Privacy and security • Subtitle text is sent only to Google’s generativelanguage.googleapis.com over HTTPS. • No watch-history collection. No analytics. No ad tracking. No third-party servers. • Translation requests go directly from your browser to Google and are billed to your own Gemini account. ■ Cost • The extension itself is free. • Translation requests are billed by Google at standard Gemini API rates. • Gemini’s free tier may be enough for light everyday use. ■ Supported sites • https://www.youtube.com / https://m.youtube.com • https://vimeo.com and embedded Vimeo players on third-party websites. • https://www.udemy.com and Udemy Business course pages. ■ Known limitations • Videos without a caption track cannot be translated. • Some private, region-restricted, or mobile playback environments may not expose readable captions. • The first translation batch may take a few seconds depending on video length and model latency. For support and bug reports, please use the support link on this page.