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Security
CORS Tester
CORS Tester
This runs the OPTIONS preflight and the actual request from our server (not your browser), so it can show you the raw CORS headers even when the browser itself would block or hide them.
Method
GET
POST
PUT
PATCH
DELETE
Target URL
Origin to simulate
Request headers to test (comma-separated, optional)
Test CORS
Preflight (OPTIONS) response
Actual request response