Context Explain

Understand anything as you read: context-aware AI explanations, translations & follow-up Q&A without leaving the page. BYO API key.

--- Context Explain gives you instant AI understanding right where you read — no tab switching, no copy-paste, no lost context. Most lookup tools treat words in isolation. Context Explain sends the surrounding passage to the AI, so "Transformer" on an ML paper gets an architecture explanation, while the same word on an engineering page gets something entirely different. Accuracy comes from context. And when one answer isn't enough, keep going — ask follow-up questions in a persistent conversation panel without ever leaving the page. --- 🎯 THREE MODES, THREE INTENTS Select any text on any webpage: • ✦ Explain — AI explains in context, drawing on the surrounding passage • ？ Ask — Type your own question about the selected text • ⇌ Translate — Translates to your target language + a brief contextual note Right-click any image to explain what it shows or ask a specific question about it. --- ✨ KEY FEATURES • Context-aware explanations — AI reads the surrounding passage, not just the selected word • Unlimited follow-ups — persistent conversation panel, full history maintained • Translate mode — translation + 1-2 sentence contextual note • Image analysis — right-click any image for visual Q&A • Resizable & pinnable floating panel — stays open while you keep reading • Markdown rendering — tables, code blocks, bold/italic, lists • Math formulas — KaTeX inline and display LaTeX • Diagrams — Mermaid flowcharts and sequence diagrams rendered as SVG • Persistent annotations — amber underlines restored after page reload • History — full-text search, export JSON, delete individual entries • UI localization — English / 简体中文 / 日本語 / 한국어 --- 🔑 BRING YOUR OWN API KEY Works with any provider you configure: • OpenAI (gpt-4o, gpt-4o-mini, …) • Anthropic Claude (claude-sonnet, claude-haiku, …) • DeepSeek (deepseek-chat, deepseek-reasoner) • Any OpenAI-compatible endpoint (OpenRouter, Ollama, etc.) Your data goes directly from your browser to your chosen API — no intermediate servers, no data collection. --- 🔒 PRIVACY • Text and context sent only to the API provider you configure • No analytics, no telemetry, no accounts, no third-party servers • All history stored locally via chrome.storage.local --- 🚀 GETTING STARTED 1. Click the ✦ toolbar icon 2. Enter your API key and select your provider 3. Select any text on any page — done!