HTTP 请求检查器
从你的浏览器获取 URL 并检查状态和响应头。受 CORS 限制：不允许跨源读取的目标无法检查。
使用方法
Enter a URL, choose GET or HEAD, and press Send request. Your browser fetches the URL and the page shows the status, the final URL after redirects, the elapsed time and every response header the browser is allowed to read. A missing scheme is filled in as https://. Requests time out after 20 seconds.
注意事项
This tool runs entirely in your browser and uses no proxy. If a site does not allow CORS (Access-Control-Allow-Origin), the browser blocks reading the response even when the server answered fine, and the check reports a failure. That is browser security working as designed, not a bug. To inspect arbitrary servers reliably, use a command-line tool such as curl -I.
常见问题
Why does example.com work but my site fails?
Usually CORS: unless the target returns Access-Control-Allow-Origin, the browser refuses to expose the response. It says nothing about whether the server is up.
Why do I only see a few headers?
Cross-origin responses only expose a small standard set of headers unless the server opts in with Access-Control-Expose-Headers.