TermLens

Highlight any term or sentence to get instant AI explanations and dive deeper with a contextual chatbot—without leaving the page.

Select any word or sentence on a webpage to receive instant AI explanations and optional deep-dive chat. TermLens is a lightweight yet powerful research companion that transforms your browser into an intelligent learning environment. Key Features: ✨ Instant Contextual Explanations: Highlight any term to get immediate, 2-3 sentence explanations powered by cutting-edge LLMs, styled as a non-intrusive floating glance. 💬 Evolutionary Deep-Dive Chat: Click "Dive Deeper" to open a full-featured chatbot that understands your page context, including the title, domain, nearest headers, and surrounding paragraphs for highly relevant answers. 🆓 Automatic Free Model Aggregator: Never worry about model costs. TermLens automatically fetches and refreshes the latest free models from OpenRouter every 2 days, ensuring you always have a working free AI at your fingertips. 🛠️ Custom Model Management: Add ANY model from OpenRouter (like GPT-4o or Claude) by simply pasting its ID. TermLens includes built-in validation and a management interface to add or delete custom configurations. 🎨 Premium Aesthetic & Customization: Switch between pristine Light and sleek Dark modes with an 8-color designer palette. Custom-tailored typography and smooth glassmorphism provide a premium, modern feel. 📑 Smart Markdown Rendering: Chat responses include full markdown support for bolding, italics, headers, and lists. Developers will love the syntax-aware code blocks with integrated one-click copying. 📍 Flexible UI: Toggle between "Fixed" or "Scroll with Page" modes to keep your research assistant exactly where you need it, and open multiple explanation windows simultaneously for comparative study. ⚡ Zero-Config Onboarding: Starts with a pre-selected working model out of the box—just add your API key and start exploring.