LocalTube Dub

An open-source Chrome extension for translating YouTube captions into Chinese and playing synchronized Chinese dubbing.

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What it does

• Uses an existing Chinese YouTube caption track when one is available.
• Otherwise translates source captions with Chrome on-device translation or a Provider selected by the user.
• Plays translated subtitles and speech on the original video timeline.
• Optionally uses the local Engine for yt-dlp caption extraction, local transcription, natural speech, and export.

LocalTube Dub has no account system, subscription, advertising, analytics, payment processing, or hosted translation backend. The Chrome Web Store release and signed desktop Engine installer are still being prepared. Do not install unofficial packages claiming to be a LocalTube Dub release.

简体中文

LocalTube Dub 是一个开源 Chrome 扩展，用于把 YouTube 字幕翻译成中文，并在原视频时间轴上播放同步中文配音。

• 优先使用 YouTube 已有的中文字幕。
• 没有中文字幕时，使用 Chrome 端侧翻译或用户自己选择的翻译服务。
• 中文字幕和配音会跟随视频播放、暂停、跳转和倍速。
• 可选的本地 Engine 提供 yt-dlp 字幕提取、本地转写、自然语音和导出能力。

项目没有账号、订阅、广告、统计、支付或托管翻译后台。Chrome 插件商店版本和已签名 Engine 安装包仍在准备中，请不要安装来源不明的所谓正式版本。