Contextual Lookup: Understand Anything with AI | Gemini, ChatGPT & More

Your AI copilot for instant contextual understanding. Explains text, code & acronyms using Gemini, ChatGPT, DeepSeek & more.

Contextual Lookup enhances the lookup experience by integrating relevant contextual information, such as surrounding text, page URL, and tab title, into the context of AI models. 🔑 Key Features: ● Seamless Activation: Simply select any text or code. A discreet bar appears below your selection; hover over it, and it smoothly expands into a definition window. Alternatively, right-click your selection and choose "Contextual Lookup" from the context menu. ● Tailored AI Responses: ● Words & Phrases: Get meanings in context with relevant example sentences. ● Acronyms: See the expanded form and a concise, Wikipedia-style definition. ● Code: Understand the effect of the selected code in its current context, complete with an illustrative snippet. ● FREE Model Options: ● Get unlimited use of Claude Sonnet 4 and Gemini 2.5 Flash FOR FREE just by signing in! ● Built-in AI: Utilize Chrome's native AI model for on-device processing (requires browser support). ● Premium Server-Side Models: Connect your own OpenRouter API key for access to a wider range of powerful models like Gemini 2.5 Pro, GPT-4o, DeepSeek R1, and more. ● Contextual Search: If the AI definition isn't quite enough, one click on the search button generates a context-aware query and opens a Google search page for deeper exploration. ● Online Mode (with Server-Side Models): Enhance AI responses by allowing the model to incorporate relevant web search results. Just click the globe icon! 💡 Why Contextual Lookup? ● Stop Wasting Time: No more manually searching for every unfamiliar term or piece of syntax. ● Understand Deeper: Get explanations tailored to the specific context you're working in. ● Boost Productivity: Whether you're coding, reading complex articles, or analyzing reports, get the information you need without breaking your flow. 💬 Join our Community! Have questions, feedback, or feature requests? Join our Discord server: https://discord.gg/CZcm4yaYJS We are constantly working to improve Contextual Lookup and add new features. Try it today and experience a smarter way to understand the web!