WebBrain is a free, open-source browser agent for Chromium and Firefox that understands pages, extracts information, and performs actions from a sidebar. It supports local models through llama.cpp and user-provided keys for OpenAI, Claude, OpenRouter, and compatible APIs; local mode keeps data on device.

Features
- Browser sidebar agent
- Page reading and data extraction
- Local-model support
- Bring-your-own API keys
Use Cases
- Summarize current pages
- Extract structured data
- Automate repetitive browser tasks
- Run private local Q&A
FAQ
WebBrain is a free, open-source browser agent for Chromium and Firefox that understands pages, extracts information, and performs actions from a sidebar. It supports local models through llama.cpp and user-provided keys for OpenAI, Claude, OpenRouter, and compatible APIs; local mode keeps data on device. Core capabilities include: Browser sidebar agent, Page reading and data extraction, Local-model support.
Common scenarios include: Summarize current pages, Extract structured data, Automate repetitive browser tasks.