Genius Annotations for Every Text on the Web
LightUp is a browser extension that takes your web experience to the next level. Highlight any text, and with a simple prompt, get instant explanations, summaries, analyses, translations, or whatever action you want—delivered right on the page, on the fly.
Unlike many tools out there, LightUp stands out by letting you use your own local LLM. This means better privacy—no data sent to the cloud—and it works offline, even when there's no connectivity. No other tool gives you this level of control and security.
Whether you're tackling dense articles, technical documents, or just exploring, LightUp keeps things smooth and tailored to you. Prompt the LLM however you like to get exactly the results you need, fast. Plus, it's free—just bring your own API key or local LLM. If you don't have either, you can still enjoy free daily use!
With LightUp, you're in charge of your insights, your privacy, and your workflow.
LightUp provides AI-powered genius annotations, making complex text simple and browsing truly insightful.
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OUR MANIFESTO
In a world drowning in information, where every click leads to more complexity, and every interaction is monitored, we lose sight of what truly matters: understanding.
Together, we've seen our web become a labyrinth—where knowledge is buried under layers of noise, where privacy is a luxury, and where our attention is constantly diverted. We are left overwhelmed, disconnected, and yearning for clarity.
But we can change that. With LightUp, we reclaim our browsing experience. We promise:
Clarity on demand: Illuminate any text with instant explanations, summaries, and insights.
Choice of intelligence: Select from multiple AI models to suit your needs.
Uncompromising privacy: Your data stays yours, always.
A tailored experience: Make the web work for you, not against you.
Freedom to roam: Offline capabilities mean you're never bound by connectivity.
A collective effort: Open-source, because knowledge should be shared, not hoarded.
With LightUp, we turn the web into a place of discovery, not distraction. It's time to reclaim our minds, our time, and our privacy.
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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 contentQuick summaries of long articles with key takeawaysDeep content analysis with detailed explanationsDark Mode support for comfortable reading in any lightingRadical Focus Mode with screen blur and clear popupAdvanced Capabilities
Automatic explanation popups from highlighted textText-to-Speech: Powered by the Web Speech APIKeyboard Shortcuts for quick access to featuresMultiple font sizes for better readabilityCustomizable highlight colors with six optionsTechnical Benefits
Google Gemini Models Support ( 1.5 Pro, 1.5 Flash , 1.5 Flash-8B, Gemini 2.0 Flash-Lite, Gemini 2.0 Flash, Gemini 2.0 Flash Thinking )Grok Integration for Advanced AI Capabilities (Grok 2)10 Local LLM Integration: ( Llama 2 70B Chat, DeepSeek V3, Mixtral 8x7B Instruct, Llama 2 13B Chat, Mistral 7B Instruct, Neural Chat V3.1, DeepSeek V3 Base, Llama 3.2 3B Instruct, Phi-2, OpenChat 3.5 )Privacy-first with local processing optionsWhat Users Are Saying
Thank you for your awesome extension! It does pretty good job.
I've been using LightUp for a week now, and honestly, I'm impressed. The interface is clean and intuitive. Just highlight and let the AI magic happen.
Super intuitive and exactly what I needed for my research. Being able to analyze text without leaving the page is a game changer.
Download LightUp Now
With LightUp, every highlight unlocks real-time insights, in-depth explanations, and transformative context — all at your fingertips.
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Frequently Asked Questions
