HTTP headers lookup

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The HTTP Headers Lookup tool sends a GET request to the specified URL and displays the response headers sent by the server. You can inspect important headers like Content‑Type, Cache‑Control, Server, and security‑related headers such as Strict‑Transport‑Security or Content‑Security‑Policy. This is useful for debugging configuration issues, verifying that security headers are correctly set, or understanding how a server behaves. The tool also shows the HTTP status code and any redirect chain.

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