U2 — YouTube Transcript & AI Summaries (Use Your Own API Key)

Get YouTube transcripts and AI summaries directly inside YouTube using your own API key. U2 lets you summarize videos with your preferred AI model and custom prompts, giving you full control over privacy, cost, and output quality. No subscriptions or accounts required. Features 📄 Transcript Viewer View and copy the full transcript of any YouTube video. 🤖 AI Video Summaries Generate concise summaries of long videos in seconds. 🔑 Use Your Own API Key Connect your OpenAI, Claude, or other AI provider. 🧠 Custom Prompts Define how summaries are generated (bullet points, notes, insights, etc.). 🔒 Privacy First & Open Source Your data is processed using your own API key. No data is shared with U2 backend or its developers. You can view our source code here: https://github.com/SudShekhar/U2/ How It Works 1) Install the U2 extension 2) Open any YouTube video 3) Add your API key 4) Generate a transcript or AI summary Perfect For • Learning from long videos • Research and study notes • Podcasts and interviews • Tutorials and lectures U2 currently supports the latest AI models from ChatGPT, Anthropic (Claude) and Google (Gemini). Support for other AI models is coming soon. U2 is open source and we welcome any contributions from others (https://github.com/SudShekhar/U2/)