SmartDub - YouTube Video Translator, Subtitles & AI Dubbing

YouTube subtitle translator for 50+ languages - bilingual subtitles, video translation and AI dubbing.

YouTube video subtitle translator and AI dubbing tool that lets you watch foreign-language YouTube videos in your native language. SmartDub adds bilingual subtitles, video translation, and lifelike AI dubbing directly to YouTube videos—without constant tab switching. Whether you are learning a language with dual subtitles, following an online course, watching interviews, or exploring creators from around the world, SmartDub keeps the original and translated content together without constant tab switching. ★ Start free • Bilingual subtitles on YouTube — forever free • Basic subtitle translation into 50+ languages, including English, Spanish, French, Japanese, Korean, Chinese, German, Portuguese, Arabic and more • Free basic dubbing in your selected language (free account required) • Adjustable subtitle font size, color, position and background opacity • Sidebar subtitle list with timestamps — click any line to jump to that moment • One-click floating button on YouTube video pages ★ Upgrade to SmartDub Pro Everything in Free, plus: • Lifelike AI dubbing across 50+ languages, with regional accents • Unmetered dubbing for normal use — no monthly minute packs to track; fair-use safeguards apply • Higher-quality, context-aware AI translation for interviews, dialogue and long videos • Priority email support ★ How it works 1. Install SmartDub and open a YouTube video. 2. Click the SmartDub icon to open the side panel. 3. Choose your target language to view bilingual subtitles and translation. 4. Open the Dubbing tab to start voice dubbing. ★ Great for • Language learners using dual subtitles • Students following lectures, courses and tutorials • Professionals keeping up with international content • Anyone who wants to understand more of YouTube ★ Pricing SmartDub is free to install and use. Optional Pro features are available through a paid subscription. Payments are handled securely through our website — SmartDub, not Google, is the seller. Current pricing, refund policy and full terms are available at smartdub.io. ★ Privacy SmartDub only runs on YouTube pages. We do not sell user data to third parties. Full privacy policy: https://www.smartdub.io/privacy