CORS Policy Checker

NET

Check and validate CORS configuration for web APIs.

Input

Enter a value and click Analyze

📖 How to Use CORS Policy Checker

Enter the network address or data

Input IP addresses, hostnames, or network parameters.

Calculate or analyse

Check and validate CORS configuration for web APIs.

View the results

See subnet ranges, network details, or analysis results.

Network analysis

INPUT

IP address or network configuration

→

OUTPUT

Network calculation result with details

✓For subnetting, use CIDR notation (e.g. 192.168.1.0/24) for clear and unambiguous notation.

✓Always document your network address plan before implementation.

✓Private IP ranges: 10.x.x.x, 172.16.x.x–172.31.x.x, 192.168.x.x (RFC 1918).

What is CORS Policy Checker used for?+

Check and validate CORS configuration for web APIs.

Do I need to be a network engineer to use this?+

No — the tool is designed to be accessible for developers, sysadmins, and curious users alike.