Check Website HTTP Headers Online for Free

The HTTP Header Checker fetches and displays the response headers for any web page — a vital tool for SEOs and developers verifying server configurations, cache-control settings, and security policies. it helps you identify misconfigurations that could affect performance. This tool is free, private, and executes all lookups in real time.

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   Enter the full URL you want to inspect (including https://).

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   Click Check Headers — all response headers appear with their values listed.

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   Review headers for cache settings

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   security flags

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   or missing CORS configuration.

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   Enter the full URL of the website you want to check.

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   Click the Check Headers button to perform a real-time request.

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   Review the Status Code and list of headers returned by the server.

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   Why are HTTP headers important?

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    Headers control how browsers interact with your site, including caching behavior, security restrictions, and content types.