OWASP Juice Shop CTF Extension is a Node.js command-line utility that facilitates the setup of Capture the Flag (CTF) events using OWASP Juice Shop challenges. The tool supports integration with multiple popular CTF frameworks including CTFd (version 3.6 or higher), RootTheBox (version 3.3 or higher), and FBCTF. It provides an interactive command-line interface that guides users through the configuration process for populating CTF game servers. The utility offers two primary modes of operation: an interactive mode where users respond to prompts in the command line, and a configuration file mode where settings can be predefined in a specific format. This allows for both manual setup and automated deployment scenarios. Installation is handled through npm as a global package, making it accessible from any directory on the system. The tool streamlines the process of preparing CTF environments by automating the population of challenges from the OWASP Juice Shop application into supported CTF platforms.