Selecting the best website for creating diagram notes largely depends on your specific needs and preferences. However, one highly recommended option is Lucidchart. This website is renowned for its intuitive interface and versatile features, making it ideal for creating various types of diagrams, such as flowcharts, mind maps, and organizational charts. Lucidchart supports real-time collaboration, which is particularly useful for team projects. Additionally, it offers a vast library of templates and shapes, simplifying the process of diagram creation. Another notable feature is its compatibility with multiple platforms, allowing you to access and edit your diagrams from different devices. Overall, Lucidchart is a powerful, user-friendly tool for anyone looking to create professional-quality diagram notes.