Swagger Preview for Notion is a free Chrome extension designed to enhance the Notion experience by allowing users to preview OpenAPI and Swagger specifications directly within their Notion pages. This tool eliminates the need for external applications, providing a seamless integration for developers who work with API documentation. With automatic detection of both YAML and JSON formats, the extension simplifies the process of viewing and interacting with API specs.

Once installed, users can easily access an interactive Swagger UI panel by clicking the 'API Preview' button that appears next to any code block containing an OpenAPI/Swagger spec. The panel is resizable for user convenience and includes features such as endpoint browsing, schema viewing, and a 'Try it out' option for sending live API requests. The extension prioritizes user privacy, requiring minimal permissions and operating solely on Notion pages.