LinkNest is a productivity-focused browser extension that acts as an intelligent workspace and high-performance moodboard for researchers, developers, and creatives. Unlike static bookmarking tools, it captures and categorizes web content in real time with automated screenshots and metadata extraction, organizing links, images, and snippets into visual boards for efficient research management. It supports seamless cross-device synchronization via secure OAuth2, ensuring instant access to saved content across environments. Built with React for a fast browser UI and powered by a Flask backend for data processing and authentication, it integrates Chrome APIs for tab management and automated capture while maintaining strong security through token-based session management.