SmartDub — YouTube Video Translator & Dubbing

Bilingual subtitles, AI translation & dubbing for any YouTube video — watch and understand foreign videos in your language.

YouTube subtitle translator and AI dubbing — watch any foreign-language YouTube video in your own language. SmartDub adds bilingual dual subtitles, AI-powered translation, and natural voice dubbing directly on the video page. No signup required, works instantly on every YouTube video. Whether you're learning a new language with bilingual subtitles, studying online courses in a foreign language, or enjoying global creators, SmartDub translates and dubs YouTube videos in seconds — one click, no tab-switching. ★ What you get for free • Bilingual subtitles (dual subtitles) on any YouTube video — forever free • AI subtitle translation into 50+ languages, including English, Spanish, French, Japanese, Korean, Chinese, German, Portuguese, Arabic & more • Free basic AI dubbing — hear the video spoken in your target language without spending a cent • Adjustable subtitle style: 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 every YouTube video page ★ Upgrade to SmartDub Pro Everything in Free, plus: • AI voice dubbing with lifelike, human-quality voices — 50+ languages, 30+ voices, regional accents (English US/UK/AU/IN, Mandarin, Spanish, Portuguese, French, Japanese, Korean & more) • Unmetered dubbing — no minute caps, no quota limits • Higher-quality AI translation: more accurate, coherent, and context-aware for interviews, dialogue, and long videos • Local audio cache — replayed segments load instantly • Priority email support ★ How it works Install SmartDub and open any YouTube video Click the SmartDub icon to open the side panel Pick your target language — bilingual subtitles and translation appear instantly Switch to the Dubbing tab to start AI voice dubbing in one click ★ Perfect for • Language learners watching YouTube with dual subtitles • Students following lectures, courses, and tutorials in foreign languages • Professionals keeping up with international content and news • Anyone enjoying global entertainment without language barriers ★ Pricing SmartDub is free to install and use. Pro features are available via a paid subscription ($7.99/month or $69/year). All payments are handled securely through our website — SmartDub, not Google, is the seller. Refund policy and full terms are available at smartdub.io. ★ Privacy SmartDub only runs on YouTube pages. We do not collect your browsing history, do not collect personal data unrelated to the service, and do not sell user data to third parties. Full privacy policy: smartdub.io/privacy.