Cybersecurity
Inspect HTTP response headers, status codes, and web security settings for a website.
Audit a public API endpoint for missing security headers before deployment.
Useful for reviewing browser-accessible security configuration and debugging HTTP responses.
HTTP & Security Tool
Inspect HTTP response information including status, content type, caching information, server details, and security-related headers.
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Enter a public HTTP or HTTPS URL.
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Enter a URL and check its HTTP response information.
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HTTP headers are metadata sent with HTTP requests and responses. They provide information about content, caching, authentication, security policies, servers, and other aspects of HTTP communication.
Developers and security teams commonly inspect response headers when troubleshooting websites, APIs, caching behavior, and web security configurations.
Describes the media type of the response.
Controls caching behavior.
Specifies the encoding applied to the response.
Provides an identifier for a specific representation.
Indicates when a resource was last modified.
Provides a target URL for redirects.
May identify the software handling the request.
Controls browser HTTPS enforcement.
Enter a public HTTP or HTTPS URL.
The checker sends the URL through an HTTP fetch service so arbitrary public URLs can be inspected without requiring your own API endpoint.
The returned response information is displayed in a structured format.
A browser cannot directly read arbitrary websites' response headers unless those websites allow the required cross-origin access through CORS.
This component therefore uses a fetch service instead of calling/api/http-headers-checker.
For a production security tool, the recommended architecture is to run your own backend fetch service and validate target URLs server-side.
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FAQ
An HTTP headers checker displays metadata returned with an HTTP response, such as content type, caching information, server information, and security-related headers.
Browser security rules restrict cross-origin access. A website must expose the appropriate CORS headers before browser JavaScript can read many cross-origin response details.
Content-Security-Policy is a security policy that controls which sources a browser may use for resources such as scripts, styles, images, and frames.
HTTP Strict Transport Security tells compatible browsers to use HTTPS for a domain for a specified period.
X-Frame-Options can control whether a browser is allowed to render a page inside a frame.
No. HTTP headers are only one part of web security. A header check should not be treated as a complete vulnerability assessment.
Yes, if the URL is publicly reachable by the fetch service and its response can be retrieved successfully.
Yes. The result can be copied or downloaded as JSON.
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It checks browser-visible headers and response metadata, but it is not a full security audit or penetration test.