Mobile Preview Sidebar is a Chrome extension designed to provide real-time mobile views of websites directly within a sidebar. It supports multiple device sizes including iPhone and Android models, making it an ideal tool for web developers, designers, and marketers. Users can easily input URLs or switch the current tab to a mobile display with a single click, ensuring a seamless workflow.

The extension offers features like automatic saving of the last used URL and device settings, fast preview capabilities, and a user-friendly interface that mimics actual device frames. This ensures that users can check mobile responsiveness without needing physical devices, increasing efficiency in web development. Privacy is also a priority, as all data is stored locally in the browser without external transmission.