Synthux is a Chrome extension designed for UX professionals and web developers, offering an AI-driven analysis of website usability. By leveraging Nielsen's 10 Usability Heuristics, this tool allows users to evaluate any webpage's user experience using synthetic user profiles. The entire analysis occurs locally, ensuring that no data is sent outside of your machine. This means users can conduct comprehensive audits without the need for signups or incurring API costs.

Key features include a local AI analysis utilizing models like Gemma 4 and Llama, accessibility audits that check WCAG compliance, and detailed scoring that provides actionable insights for improvement. Users can choose between a quick scan or a thorough analysis, and the results can be exported in Markdown format for easy sharing or integration into project management tools. Synthux combines privacy and functionality, making it a valuable resource for enhancing web usability.