Raw capture — raw/cors-fetch.md

url: https://tools.simonwillison.net/cors-fetch date_fetched: 2026-07-05 backfilled: true

CORS Fetch Tester Send HTTP requests and inspect what the browser lets you see through CORS. Import from curl Import Request URL GET POST PUT PATCH DELETE HEAD OPTIONS ▼ Request Headers 0 + Add header Request Body None JSON Form (URL-encoded) Enter valid JSON for the request body. + Add field Send request If you omit the scheme, https:// will be added. If CORS isn't enabled, the browser will block the response. Response (last request) No request yet Headers Only headers exposed by CORS are visible No headers yet. Body Shown as text (UTF-8) Copy Format JSON // Response body will appear here Inline Images