YouTube Dubbing

YouTube Dubbing is a dubbing tool. A browser extension that plays AI-generated dubbed audio over foreign-language videos, with 138 language support, voice switching and speaker detection. Works on YouTube, Udemy, Bilibili and gamedev.tv, with a free tier and a paid membership for optimized subtitles and background audio.

YouTube Dubbing is a browser extension that replaces the subtitle-only approach most translation plugins take. Rather than just layering translated captions over a video, it plays dubbed audio in the target language, so a viewer can listen to a French, Korean or Portuguese video in English while the original is still on screen. The playback stays in step when you pause, scrub or change speed, which is the part many simpler tools get wrong. The extension covers 138 languages and works across Chrome, Firefox and Safari, including iOS, plus separate Android and iOS apps. Site support currently centers on YouTube, Udemy, Bilibili and gamedev.tv. Translation runs on GPT and Claude-series models, with a Gemini option reserved for paying members. Voice banks are tied to the target language, and users can pick male, female or regional accents. Two members-only features add polish: background audio preservation, which keeps the original music and ambient sound under the dub, and speaker recognition, which detects multiple voices and lets you assign a different one to each. A color system tells you what you are working with. Red means platform auto-generated subtitles, yellow means creator uploads, green means AI-optimized subtitles. The green tier is the reason to pay: the plugin re-recognizes captions in the background at roughly one tenth of the video length, emails you when done, and then translates only from the cleaner source. AI translation is deliberately blocked on red sources to avoid burning quota on bad input. Videos with no captions at all can be uploaded for recognition. Beyond dubbing, the tool summarizes subtitles on any supported site, offers a text-to-speech reader for selected webpage text, and includes an editor for saving your own subtitle version before translation. It suits language learners, developers working through foreign tutorials, and viewers who want international course or conference content without reading. Compared with caption translators like YouTube's built-in auto-translate, it trades configurability for audio immersion.