# PolyDub > 为 YouTube、Udemy、BiliBili、Coursera 等视频网站提供实时语音与字幕翻译、AI 要点总结与知识流程图生成。。 Canonical page: [https://chrome-stats.com/d/polydub](https://chrome-stats.com/d/polydub) ## Overview - **ID:** `polydub` - **Platform:** Firefox - **Type:** Firefox add-on - **Status:** Available - **Publisher:** chengpeng - **Category:** language-support - **Daily users:** 70 - **Weekly downloads:** 10 - **Rating:** 3.67 / 5 (3 ratings) - **Version:** 1.0.8 - **Last updated:** 2026-04-21 - **First published:** 2025-10-10 - **Size:** 644 KB - **Data as of:** 2026-09-10 - **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/polydub/) - **Website:** [https://poly-dub.com/](https://poly-dub.com/) ## Description 🌐 PolyDub — AI 智能视频翻译·配音·要点总结扩展 PolyDub — AI Real-Time Video Translation, Dubbing & Summary Extension 为 YouTube、Udemy、BiliBili、Coursera 等视频网站提供实时语音与字幕翻译、AI 要点总结与知识流程图生成。 支持语音配音、字幕下载，让外语视频轻松可懂、学习高效、沉浸体验。 Real-time speech & subtitle translation, AI key-point summaries, and knowledge flowcharts for YouTube, Udemy, BiliBili, Coursera, and more — turning any foreign video into an easy-to-understand, structured learning experience. ─────────────────────────────── 🌟 核心功能 / Core Features ─────────────────────────────── 🎬 实时字幕翻译与下载 / Real-Time Subtitle Translation & Download ・多语言字幕自动翻译，边看边译 ・一键下载原文与译文字幕（SRT / VTT 格式） ・支持英语、日语、韩语、法语、德语等 20+ 主流语言 ・Automatic subtitle translation in real time while watching ・One-click download of original & translated subtitles (SRT / VTT) ・Supports English, Japanese, Korean, French, German, and 20+ languages 🗣️ AI 智能视频语音配音 / AI Video Voice Dubbing ・采用 Microsoft Azure、Google TTS 与本地 Edge 语音引擎 ・实时语音转换：替换原视频音频为 AI 配音 ・自然流畅、音色可选的多语言语音体验 ・Powered by Microsoft Azure, Google TTS, and local Edge voices ・Real-time voice conversion with natural, selectable multilingual voices 🧩 AI 要点总结与解说 / AI Key-Point Summary & Commentary ・一键提炼整段视频的核心观点，快速抓重点 ・自动生成章节大纲与时间戳，点击即跳 ・AI 解说式要点梳理，让长视频 5 分钟看懂 ・Distill the whole video into key points with a single click ・Auto-generated chapters & timestamps — click to jump instantly ・AI commentary-style digest turns a long video into a 5-minute read 🧠 知识流程图生成 / Knowledge Flowchart Generation ・基于视频内容自动生成知识流程图 ・把复杂讲解转化为可视化结构，一眼看清逻辑脉络 ・特别适合课程、教程、科普与技术讲解类视频 ・Automatically build a flowchart from any video ・Turn complex narration into a clear visual structure ・Ideal for courses, tutorials, science & tech explainers 💻 多平台支持 / Multi-Platform Support ・兼容 YouTube、Udemy、BiliBili、Coursera 等主流平台 ・实时语音与字幕处理，无需下载即可享受翻译 + 总结 ・Works on YouTube, Udemy, BiliBili, Coursera and more ・Real-time processing — no download required 📂 本地视频播放 / Local Video Support ・支持本地视频字幕翻译、AI 配音、要点总结与字幕下载 ・离线场景也能享受完整翻译与学习体验 ・Subtitle translation, AI dubbing, summary and download for local videos ・Full experience even in offline learning scenarios ─────────────────────────────── 🧪 技术特色 / Technical Highlights ─────────────────────────────── ・AI 深度学习翻译与摘要引擎，准确且结构化 ・基于大模型的章节提取与流程图建模 ・支持多种字幕格式（SRT、VTT） ・智能语音同步技术，确保音画一致 ・可调节播放速度、音量与语音参数 ・高度个性化的设置项，贴合每位用户习惯 ・Deep-learning translation & summarization engine for accurate, structured output ・LLM-powered chapter extraction and flowchart modeling ・Multi-format subtitle support (SRT, VTT) ・Smart speech–video sync for natural alignment ・Adjustable playback speed, volume, and voice parameters ・Rich personalization options ─────────────────────────────── 📚 适用场景 / Use Cases ─────────────────────────────── ・外语课程与在线教程：一边配音听，一边看要点复习 ・国外影视与纪录片：AI 配音 + 要点梳理，沉浸且高效 ・在线教育与企业培训：流程图辅助理解，离线也可用 ・跨语言知识获取：技术演讲、科普、论文解读一键看懂 ・Foreign-language courses & tutorials — dubbed playback + key points for review ・Movies & documentaries — immersive dubbing with structured summaries ・Online education & corporate training — flowcharts for faster comprehension, offline-ready ・Cross-language knowledge — tech talks, science explainers, paper walkthroughs at a glance ─────────────────────────────── 🔑 功能亮点 / Key Highlights ─────────────────────────────── ✅ 实时语音翻译 — 边看边听，无需等待 ✅ AI 要点总结 — 长视频秒变精华 ✅ 知识流程图 — 复杂内容可视化 ✅ 字幕下载 — 原文 & 译文一键保存 ✅ 多语言支持 — 覆盖 20+ 种主流语言 ✅ 无广告干扰 — 纯净专注的学习体验 ✅ Real-time voice translation — watch and listen without waiting ✅ AI key-point summary — turn long videos into essence ✅ Knowledge flowchart — visualize complex content ✅ Subtitle download — save both original and translated ✅ 20+ languages supported ✅ Ad-free, focused learning ─────────────────────────────── 🚀 愿景 / Vision ─────────────────────────────── 让语言不再成为获取知识的障碍，让长视频不再成为时间的消耗。 通过 AI 翻译、配音、要点总结与知识流程图， PolyDub 致力于打造真正无障碍、高效率的全球化学习体验。 Break language barriers and beat information overload. With AI translation, dubbing, key-point summaries, and knowledge flowcharts, PolyDub delivers a truly borderless and efficient global learning experience. ## Rankings - #13,801 — Overall - #62 — poll - #103 — policy ## Permissions and access ### Permissions - `storage` - `webRequest` - `activeTab` - `` ### Content script matches - `` ## Safety - **Risk impact:** High risk impact - **Risk likelihood:** Moderate risk likelihood ### Analysis details - Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site. - This extension has low user count. Unpopular extensions may not be stable or safe. > Some risk analysis details are omitted from this free response. 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