PenWeb: Pen, Note & AI Study Assistant

Draw, highlight and study with AI on any page or PDF — summaries, flashcards and editable maps. No account; bring your own key.

PenWeb turns any page, PDF or video lecture into a study canvas. Draw, highlight and annotate without changing the site, and use the side panel to summarize, explain, create flashcards and build mind maps. MAIN FEATURES - Pressure-sensitive pen, highlighter, shapes, lasso, ruler and eraser. - Side panel with page chat, history and context. - Editable summaries, flashcards and mind maps; open a map in a tab, drag blocks and export PNG. - Attach screenshots, drop images or paste with Ctrl+V for AI analysis. - Works on articles, in-browser PDFs, video lectures and study platforms. - Keyboard shortcuts, light/dark theme, high contrast and screen-reader support. NO ACCOUNT. YOUR KEY, YOUR DATA. PenWeb is free and requires no sign-up. AI features are optional and use your own OpenRouter, Google Gemini, Groq or DeepSeek key; Ollama runs locally. The key stays in your browser. When you use AI, the necessary content goes directly to the provider you chose — PenWeb has no intermediate server and uses no ads or analytics. PRIVATE BY DEFAULT Highlights, notes, drawings, maps, flashcards and history stay in your browser's local storage. You can delete your data from the panel options or by clearing the extension data. Read the Privacy Policy to see exactly what is sent for each AI action. SETUP 1. Install PenWeb. 2. Open any page or PDF and use the floating button. 3. For AI, open AI Settings, get a free key and save it. Built for students, exam candidates, teachers and anyone who reads and reviews a lot in the browser.