CORS Header Builder
CORS Header Builder
Generate Access-Control-Allow-* headers for common cross-origin scenarios. Detect wildcard and credentials conflicts early.
Generated Result
CORS Checklist
1. If using cookies or Authorization credentials, browsers do not accept * as Allow-Origin.
2. Preflight requests typically also require the server to correctly respond to OPTIONS.
3. Frontend can only see non-simple response headers that are exposed via Access-Control-Expose-Headers.
JSON Preview
{
"headers": [
{
"name": "Access-Control-Allow-Origin",
"value": "https://app.geekformat.com"
},
{
"name": "Access-Control-Allow-Methods",
"value": "GET, POST, PATCH, DELETE, OPTIONS"
},
{
"name": "Access-Control-Allow-Headers",
"value": "Content-Type, Authorization, X-Request-Id"
},
{
"name": "Access-Control-Expose-Headers",
"value": "ETag, X-Trace-Id"
},
{
"name": "Access-Control-Allow-Credentials",
"value": "true"
},
{
"name": "Access-Control-Max-Age",
"value": "600"
}
],
"warnings": []
}