概述
Watch YouTube videos in any language — with real-time AI bilingual subtitles.
YouTube Bilingual Subtitles automatically layers translated subtitles on top of YouTube videos as you watch. The original caption appears above, and the AI translation appears below — perfectly time-synced, just like professional subtitles.
How It Works
Install the extension
Get a free DeepSeek API key
Open any YouTube video with captions
Click the extension icon → paste your API key → choose target language
Translated subtitles appear automatically on the video
Features
Dual Subtitles: Original + translated text displayed together
AI-Powered: Uses DeepSeek V4 for fast, accurate translations
Three Display Modes: Bilingual / Translation Only / Original Only
Smart Cache: Watch the same video twice? Zero API cost — translations load instantly
Export SRT: Download bilingual subtitles as .srt files
Customizable: Adjust font size, subtitle position, and margins
7 Target Languages: Chinese, English, Japanese, Korean, French, German, Spanish
Lightweight: No account required, no tracking, no server
Privacy
No data collected: Your API key stays in your browser (chrome.storage.local)
No server: All translation requests go directly from your browser to DeepSeek
No tracking: No analytics, no telemetry
观看任意语言的 YouTube 视频——享受实时 AI 双语字幕。