SpeechBridge - YouTube AI Dubbing & Voice Translation

Real-time AI dubbing and voice translation for YouTube videos with audio ducking and timeline synchronization.

Stop straining your eyes on subtitles! Experience YouTube videos dubbed directly into your native language in real-time. SpeechBridge is a powerful, lightweight Chrome extension designed to transform foreign-language YouTube videos into natural, synchronized voiceovers. By capturing video captions and synchronizing neural speech synthesis to the original video timeline, SpeechBridge lets you watch overseas videos like listening to a native podcast or a professionally dubbed movie. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ KEY FEATURES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1. Real-Time Neural AI Dubbing Translate and dub subtitles on-the-fly using high-definition, natural-sounding neural voices. Say goodbye to monotonous, robotic speech synthesis. 2. Smart Smooth-Sync Technology Unlike crude text-to-speech tools that talk over each other or fall behind, SpeechBridge features an adaptive playback-rate algorithm (Smooth Boost). It dynamically adjusts speech pace by tiny fractions (±0.04) to keep dubbing perfectly in sync with the video timeline and speaker motions. 3. Professional Audio Ducking When the translated AI voice begins speaking, the extension automatically lowers the original YouTube video volume (default 15%, fully adjustable from 0% to 100%). You keep the original background music and ambiance while hearing crystal-clear translated speech. 4. Native In-Player Controls SpeechBridge integrates directly into the native YouTube video player bar. Toggle dubbing on/off, switch target languages, or adjust speech speed (0.7x - 1.6x) and background volume without ever leaving full-screen mode or clicking separate browser menus. 5. Bilingual Subtitles Need to learn a language or cross-check terms? SpeechBridge allows simultaneous display of both the original and translated subtitles on screen. 6. 17 Global Languages Supported Translate and dub seamlessly between: • English • Chinese (Simplified & Traditional) • Spanish (Español) • Japanese (日本語) • Korean (한국어) • French (Français) • German (Deutsch) • Portuguese (Português) • Russian (Русский) • Italian (Italiano) • Vietnamese (Tiếng Việt) • Thai (ไทย) • Indonesian (Bahasa Indonesia) • Turkish (Türkçe) • Arabic (العربية) • Hindi (हिन्दी) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW TO USE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1. Install SpeechBridge and open any YouTube video that has subtitles/closed captions (CC). 2. Look at the bottom-right control bar of the YouTube player and click the new "AI Dubbing" button. 3. Select your desired dubbing language and preferred voice. 4. Enjoy natural, hands-free video viewing! ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ PRIVACY & SECURITY FIRST ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • SpeechBridge operates locally in your browser (Manifest V3). • No personal account or sign-up required. • No browsing history, cookies, or personal user data is ever collected, stored, or sold. Transform the way you watch global content today with SpeechBridge!