SubExtractor

Real-time AI transcription and subtitle extraction for video content

SubExtractor turns any video into clean, searchable text — entirely on your device. Whether you're studying a talk, taking meeting notes, or saving a transcript, SubExtractor transcribes audio and pulls existing captions right in a side panel. No account, no cloud upload, no subscription. Your audio and text never leave your browser. What it does • 🎙️ On-device transcription — capture any tab's audio and transcribe it with a local AI speech model. Nothing is sent to a server. • 📝 Site caption extraction — instantly grab existing subtitles, with clickable timestamps, from YouTube, TED, Vimeo, CNN, Dailymotion, and JW.org (plus a general fallback for other sites). • ⏱️ Timestamped & seekable — click any line to jump straight to that moment in the video. • ✨ AI clean-up — fix punctuation, capitalization, and spacing to turn raw captions into readable prose. • 🧾 AI summaries — get a TL;DR plus key points, each linked to the moment it's discussed. • 🔎 Search, edit, copy & download — full-text search, an editable transcript, and one-click copy or .txt export. Private by design Transcription, clean-up, and summaries all run locally using on-device AI. There are no servers, no sign-in, and no analytics — the text is yours. Great for Students, researchers, journalists, note-takers, language learners, and anyone who'd rather read than re-watch. Good to know The AI clean-up and summary features use Chrome's built-in on-device AI, available on supported desktop hardware and recent Chrome versions. Where it isn't available, SubExtractor automatically falls back to standard clean-up, and caption extraction and transcription keep working.