IT & Developers

CORS Headers Generator - Generate CORS configuration for different servers

Generate CORS configuration for different servers

Created and maintained by: CalcTago Editorial TeamLast updated: 2026-02-09

Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.

Methodology About CalcTago Contact

Region

Allowed Origins

Allow CredentialsPreflight Cache (seconds)

Server Type

CORS Headers

{
  "Access-Control-Allow-Origin": "*",
  "Access-Control-Allow-Methods": "GET, POST, OPTIONS",
  "Access-Control-Allow-Headers": "Content-Type, Authorization",
  "Access-Control-Max-Age": "600"
}

Server Configuration

Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, OPTIONS
Access-Control-Allow-Headers: Content-Type, Authorization
Access-Control-Max-Age: 600

Preflight Response

HTTP/1.1 204 No Content
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, OPTIONS
Access-Control-Allow-Headers: Content-Type, Authorization
Access-Control-Max-Age: 600

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Frequently asked questions

What is CORS?

Cross-Origin Resource Sharing - browser security feature controlling cross-domain requests.

Why can't I use * with credentials?

Spec prohibits Access-Control-Allow-Origin: * when credentials are included. Must specify exact origin.

What is preflight?

OPTIONS request sent before actual request for non-simple requests. Max-Age caches this.

About this tool

Inputs

Allowed Origins
Allowed Methods
Allowed Headers
Allow Credentials
Preflight Cache (seconds)
Server Type
Headers only
Yes
No

Results

CORS Headers
Server Configuration
Preflight Response

The CORS Headers Generator turns your specifications into usable output. Adjust the settings to match your exact requirements. Provide allowed origins, allowed methods, allowed headers, allow credentials, preflight cache (seconds), server type, headers only, yes and no to get started. The tool derives cors headers, server configuration and preflight response from your entries. The transformation is deterministic — the same input always produces the same output. Industry standards define the rules these tools follow — consistent output means fewer surprises in production.

Always specify the character encoding (usually UTF-8) before encoding or hashing text. From students to professionals, anyone who needs to generate cors configuration for different servers benefits from getting an instant, verifiable answer. Correct data handling prevents corruption, security vulnerabilities, and interoperability issues. Change one variable while holding the others constant to isolate its impact. This sensitivity check is often more informative than a single result. Copy the exact output — invisible whitespace or line breaks can invalidate a hash or token.