XSS Checker

The XSS Checker ingests HTML, script blocks, or URLs and performs static analysis to identify common cross-site scripting vectors. It catalogs findings by vector class, context (attribute, element, or DOM), and suspected payload type.
Conceptually it relies on a ruleset derived from OWASP XSS prevention cheat sheet, industry best practices, and known payload families. It does not execute code in a browser; instead it simulates how a naive sanitizer would fail, flagging risky patterns.
Core features include input normalization, context-aware detection, severity scoring, location of vulnerability, and remediation guidance. It supports batch analysis by providing per-input results, correlation across inputs, and export-ready JSON results.
Intended users include developers integrating checks into CI, security analysts validating user input controls, and QA teams verifying remediation. The tool's unique value lies in its balance of fast static checks with structured, actionable outputs that map to concrete code changes.