EarDub

EarDub is a browser extension, available for Chrome, Edge and Firefox, that adds real-time AI dubbing to YouTube and to other video sites you explicitly allow, such as Udemy, Coursera, Bilibili, X and Gumroad. Instead of translating captions fragment by fragment, it first joins the captions into complete sentences, translates them with context-aware AI and then generates speech with neural voices. The result plays in sync with the picture, and each sentence is timed to the speaker's words, speeding up slightly (up to 1.45x) to keep pace. If you jump to another point in the video, the voice realigns on its own.

The extension supports 75 dubbing languages and more than 300 voices, including regional accents, and source audio can be any spoken language, with auto-detection working best for English, Japanese, Korean and Spanish. Separate volume sliders let you blend the original audio under the dub or mute it entirely, and bilingual subtitles can be shown from 14 to 28 px or hidden. Dubbing only starts when you press the button, and EarDub runs only where you allow it. On paid plans it can also recognise speech in videos that have no captions at all.

The pricing tier is generous at the entry level: a free plan covers about 30 minutes a day, up to roughly 180 minutes a month, while Basic and Pro add speech recognition for uncaptioned videos and higher limits. A web demo on the site lets you hear sample dubs in 17 languages without installing anything. It is a practical fit for learners and professionals who need to follow coding tutorials, courses and market analysis in a language they do not speak fluently.