CORS Header Checker
Check CORS (Cross-Origin Resource Sharing) headers configuration for any website or API endpoint
Cross-Origin Request Configuration
How CORS Works: Enter the origin (your website) and target (API/resource) to check if cross-origin requests would be allowed.
CORS Analysis Results
Enter origin and target URLs to check CORS compatibility
About CORS Header Checker
A comprehensive CORS header checker that analyzes Cross-Origin Resource Sharing configuration for websites and API endpoints. This tool validates CORS policies, checks header implementation, and provides security recommendations for proper cross-origin request handling.
Why use a CORS Header Checker?
CORS configuration is critical for web security and API accessibility. Proper CORS headers prevent security vulnerabilities while enabling legitimate cross-origin requests. This tool helps identify misconfigurations that could block valid requests or expose security risks.
Who is it for?
Essential for API developers configuring cross-origin policies, web developers implementing secure frontend-backend communication, security engineers auditing CORS configurations, and DevOps teams managing API security. Perfect for anyone working with modern web applications that require cross-origin resource sharing.
How to use the tool
Enter the URL or API endpoint you want to check for CORS headers
Click 'Check CORS Headers' to analyze the configuration
Review the CORS headers status and security score
Examine detailed analysis of each CORS header
Follow recommendations to improve your CORS security configuration
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