The name "Cerebr" comes from a Latin root related to "brain" or "cerebrum". This etymology reflects our vision: to integrate powerful AI capabilities from Claude, OpenAI, and others, making Cerebr your second brain for deep reading and understanding. Cerebr is a powerful browser AI assistant extension, available for Chrome, Firefox, and Edge, focused on enhancing your work efficiency and learning experience.
Born from a need for a clean, efficient browser AI assistant, Cerebr stands out with its minimalist design and powerful features. While other solutions often come with limitations or cluttered interfaces, Cerebr focuses on delivering a seamless, distraction-free experience for your web browsing needs.
- 🎯 Smart Sidebar - Quick access via hotkey (Windows:
Alt+Z/ Mac:Ctrl+Z) to chat with AI anytime, anywhere - 🔄 Multiple API Support - Configure multiple APIs to flexibly switch between different AI assistants
- 🔁 Config Sync - Cross-browser API configuration synchronization for seamless device switching
- 💻 Multi-Platform Support - Available for Chrome, Firefox, and Edge, bringing a consistent experience across browsers.
- 📝 Comprehensive Q&A - Support webpage content Q&A, PDF document Q&A, image Q&A and more
- 🎨 Elegant Rendering - Perfect support for Markdown text rendering and LaTeX math formula display
- ⚡ Real-time Response - Stream output for instant AI replies
- ⏹️ Flexible Control - Support stopping generation at any time, sending new messages will stop the current generation
- 🌓 Theme Switching - Support light/dark themes to protect your eyes
- 🌐 Web Version - Support web version, no installation required, accessable from any browser, support vercel, GitHub Pages and cloudflare pages deployment
- 💾 State Persistence - Automatically save chat history, sidebar status, etc.
- 🔄 Config Sync - Cross-device configuration sharing through browser's native sync API
- 🔍 Smart Extraction - Automatically identify and extract webpage/PDF content
- ⌨️ Shortcut Operations - Support hotkey to clear chat (Windows:
Alt+X/ Mac:Ctrl+X), up/down keys for quick history recall - 🔒 Secure & Reliable - Support multiple API key management with local data storage
- 🎭 High Compatibility - Officially supports Chrome, Firefox, and Edge, adapting to various webpage environments.
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🔑 Configure API
- Click the settings button
- Fill in API Key, Base URL and model name
- Support adding multiple API configurations
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💬 Start Chatting
- Use hotkey Windows:
Alt+Z/ Mac:Ctrl+Zto summon sidebar - Input questions and send
- Support image upload for visual Q&A
- Use hotkey Windows:
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📚 Webpage/PDF Q&A
- Enable webpage Q&A switch
- Automatically identify and extract current page content
- Support intelligent PDF file Q&A
↔️ Resize Sidebar - Drag the sidebar’s left edge to resize; double-click the edge to reset to default width- ⌨️ Send Message -
Enterto send,Shift+Enterfor a new line,Escto blur the input - ⬆️⬇️ Recall Previous Questions - When the input is empty, press
↑/↓to cycle through your recent questions; press↓at the newest item to return to an empty input - 📋 Context Menu - Right-click a message (or long-press on touch devices) for copy/regenerate/delete;
Escto close - 🖼️ Image Preview - Click an image to preview; press
Escor click outside to close
- 📋 Right-click Copy - Support right-click to directly copy message text
- 🔄 History Records - Use up/down arrow keys to quickly recall historical questions
- ⏹️ Stop Generation - Show stop button when generating messages, can stop generation at any time
- 🖼️ Image Preview - Click images to view full size
- ⚙️ Custom Settings - Support customizing hotkeys, themes and more
- You can quickly deploy the web version of Cerebr to Fugue with one click:
- You can quickly deploy the web version of Cerebr to Vercel with one click:
- You can deploy to Cloudflare Pages:
2.1 After registering a Cloudflare account, apply for a Workers API TOKEN.
After entering the Cloudflare homepage, select "Profile" in the upper right corner -> "My Profile" -> "API Tokens" -> "Create Token" -> "Edit Cloudflare Workers" -> You can choose the permissions for "Account Resources" and "Zone Resources" by yourself -> Continue to summary -> Create Token -> Save the token (Note: Save your token properly as it will only be displayed once).
2.2 Return to the homepage, find "Workers" on the left -> Open "Workers & Pages" -> Click "Create" -> "Pages" -> "Import an existing Git repository" -> Find the forked repository -> Begin setup.
2.3 Enter a name you like for the project, and in the "Build command" field, input:
bash scripts/prepare_pages_site.sh pages-site
2.4 In the "Build output directory" field, input:
pages-site
2.5 No additional environment variables are required for the standard Git-connected Pages deployment flow.
2.6 Save and deploy.
- You can also deploy to GitHub Pages:
# Fork this repository
# Then go to your repository's Settings -> Pages
# In the "Build and deployment" section:
# - Select "Deploy from a branch" as Source
# - Choose your branch (main/master) and root (/) folder
# - Click SaveThe deployment will be automatically handled by GitHub Actions. You can access your site at https://<your-username>.github.io/cerebr
- 🌐 Access Cerebr from any browser without installation
- 💻 Same powerful features as the Chrome extension
- ☁️ Deploy your own instance for better control
- 🔒 Secure and private deployment
After installing the dmg file, you need to execute the following command:
sudo xattr -r -d com.apple.quarantine /Applications/Cerebr.appThis project uses Pake to pack the dmg file, the command is as follows:
iconutil -c icns icon.iconset
pake https://xxx/ --name Cerebr --hide-title-bar --icon ./icon.icns- 🆕 Added image Q&A functionality
- 🔄 Optimized webpage content extraction algorithm
- 🐛 Fixed math formula rendering issues
- ⚡ Improved overall performance and stability
This project is developed using Chrome Extension Manifest V3, with main tech stack:
- 🎨 Native JavaScript + CSS
- 📦 Chrome Extension API
- 🔧 PDF.js + KaTeX + Marked.js
Issues are welcome for discussion. To reduce maintenance cost, this project does not accept any feature PRs (new/improved features); please discuss feature requests in Issues. PRs are only accepted for bug fixes.
Before submitting a bug-fix PR, please ensure:
- 🔍 You have searched related issues
- ✅ Follow existing code style
- 📝 Provide clear description and reproduction steps
This project is licensed under the GPLv3 License