Microsoft has launched NLWeb, an open-source project that aims to transform any existing website into an artificial intelligence-powered application by integrating natural language capabilities. The project, which was announced at Microsoft Build 2025, aims to provide developers with the fastest and easiest way to turn any website into an AI app powered by the large language model of their choice. Once integrated, people can query the contents of any website using their voice, just as they do with AI assistants such as ChatGPT or Microsoft Copilot. NLWeb uses semistructured data from websites like Schema.org and RSS information, combining these with Language Learning Models (LLMs) to create a natural language interface accessible to both humans and AI agents. The project is technology-agnostic, supporting major operating systems besides Windows, such as Android, iOS, and Linux. Microsoft aims to bring the benefits of generative AI search directly to every website and is building NLWeb with an eye toward future AI agents.