xss-labs: A Zero-Setup Playground for Mastering XSS Vulnerabilities

This open-source project significantly lowers the barrier to entry for cybersecurity training by offering a completely browser-based, zero-setup environment. By simulating real-world XSS vulnerabilities across multiple contexts without requiring backend configurations, xss-labs provides an immediate, hands-on learning experience. It empowers developers and security researchers to easily understand and mitigate one of the most persistent web threats.