A browser extension that keeps you in the zone

LightUp is a browser extension that keeps you in the zone, unlocks instant explanations, and expands your knowledge—simply by highlighting any text on the web.

Core Features

Smart Text Analysis for instant understanding of web content

Quick summaries of long articles with key takeaways

Deep content analysis with detailed explanations

Context Awareness Mode: Understands surrounding content for accurate results

Context Limit: Adjusts text consideration for deeper insights

Dark Mode support for comfortable reading in any lighting

Advanced Capabilities

Automatic explanation popups from highlighted text

User feedback loops to improve AI outputs

Text-to-Speech: Powered by the Web Speech API

Keyboard Shortcuts for quick access to features

Multiple font sizes for better readability

Customizable highlight colors with six options

Technical Benefits

OpenAI Integration with GPT-4 Turbo, GPT-4, and GPT-3.5 Turbo

Google Gemini Models Support (Pro, Pro Vision, 1.5 Pro, 1.5 Flash)

Local LLM Integration (llama.cpp, LM Studio, Text Generation WebUI)

Privacy-first with local processing options

Radical Focus Mode with screen blur and clear popup