Link Checker
Check whether a URL is reachable and what status it returns.
Some sites block cross-origin checks (CORS). When that happens we mark the link as unknown — the link may still work; the browser just can't see the server's response.
About Link Checker
Link Checker sends a request to a URL from your browser and reports whether it's reachable. Useful for quick smoke tests on your own links. Note that some servers block cross-origin checks for security.
Frequently asked questions
Browsers enforce a security rule called CORS that blocks cross-origin checks for many sites. The link can still work — the browser just can't see the response.