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CORS Header Generator

Generate CORS (Cross-Origin Resource Sharing) headers with a visual builder. Explanation of each option included. Free CORS config tool.

Web & SEODeveloper Tools
Instant results

Configuration

Access-Control-Allow-Origin
Access-Control-Allow-Methods
Access-Control-Allow-Headers
Access-Control-Expose-Headers
Max-Age
24h 0m
Credentials

Output

Header Explanations

Allow-Origin — Specifies which origins can access the resource. Use '*' for any origin, or list specific domains for security.
Allow-Methods — Specifies which HTTP methods are allowed when accessing the resource during preflight requests.
Allow-Headers — Specifies which HTTP headers can be used during the actual request. Browsers send these in preflight.
Expose-Headers — Specifies which response headers the browser should expose to the requesting client code.
Max-Age — How long (in seconds) the results of a preflight request can be cached. Reduces preflight requests.
Credentials — Whether the browser should include credentials (cookies, HTTP auth, TLS client certs) with requests. Cannot be used with origin: '*'.

How to Use CORS Header Generator

1

Open CORS Header Generator

Navigate to CORS Header Generator in your browser — no installation or sign-up required.

2

Enter your data

Type, paste, or upload the content you want to process into the input area.

3

Configure options

Adjust any available settings to customize the output to your needs.

4

Get your result

The result appears instantly. Copy it to your clipboard or download it as a file.

Frequently Asked Questions

CORS Header Generator is a free online web development tool. Generate CORS (Cross-Origin Resource Sharing) headers with a visual builder. Explanation of each option included. Free CORS config tool.

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