CORS Policy Checker
Test CORS configuration and check allowed origins.
What is CORS Policy Checker?
A CORS Policy Checker is a tool that analyzes a website’s Cross-Origin Resource Sharing (CORS) configuration to determine whether it allows or restricts requests from other domains. CORS is a security mechanism implemented by web browsers that controls how resources on a web server can be accessed from different origins (domains, protocols, or ports). The checker reviews the server’s response headers, such as Access-Control-Allow-Origin, to see which external sources are permitted to access the website’s resources. By identifying misconfigurations or overly permissive settings, the tool helps developers improve security and prevent unauthorized cross-origin access in web applications.
How Does CORS Policy Checker Work?
A CORS Policy Checker works by sending requests to a website and analyzing the HTTP response headers returned by the server. It inspects headers such as Access-Control-Allow-Origin, Access-Control-Allow-Methods, and Access-Control-Allow-Headers to determine which external domains are allowed to access the site’s resources. The tool then evaluates whether the configuration is secure or overly permissive. If issues are found—such as allowing access from any origin—it highlights potential security risks and provides insights to help developers properly secure their cross-origin access policies.
