The MongoDB Web Shell is a web application designed to emulate features of the mongo terminal shell, aimed at enhancing user interaction with MongoDB through platforms such as try.mongodb.org, 10gen Education, and MongoDB API documentation. The shell, predominantly written in JavaScript, provides a responsive command-line interface that interacts with a backing database via a RESTful interface built on Flask. It offers sandboxing capabilities, preloading frameworks, and data verification features for educational purposes. A significant technical challenge addressed in its development was enabling a blocking code paradigm without hindering browser functionality, solved by implementing a JavaScript evaluator that pauses execution, resembling coroutines. The revamped shell aims to replace the existing version on try.mongodb.org, offering improved JavaScript support and a new tutorial system, while also facilitating coursework on the 10gen Education platform by allowing students to complete and submit assignments online. The web shell will also be embedded in MongoDB’s API documentation to enable immediate command testing. The project is open-source under the Apache license, inviting contributions through GitHub.