HTTPヘッダービューアー
任意のウェブサイトのHTTPレスポンスヘッダーを表示します。セキュリティヘッダーとサーバー情報を分析します。
URLを入力
機能紹介
The HTTP Headers Viewer tool shows response headers for a URL so you can inspect caching, security, and server information. It is useful for debugging deployments and checking best practices.
このツールを使うタイミング
Use this tool whenever you want to inspect headers: verifying redirects, checking CORS, reviewing security headers, or analyzing CDN behavior.
使い方
Enter a URL
Paste the full URL of the page or endpoint whose headers you want to inspect.
Fetch response headers
Request the URL and view the returned HTTP status and header fields.
Analyze header values
Review caching, security, and content‑type headers to confirm they match your expectations.
使用例
Checking HSTS and CSP
Confirm that HTTP Strict‑Transport‑Security and Content‑Security‑Policy headers are present and correctly configured after a deployment.