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.
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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