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HTTP Header Checker

Analyze HTTP headers from any URL. Perfect for developers, SEO professionals, and debugging web requests.

Enter URL to Check Headers

HTTP Headers Output

Enter a URL to check HTTP headers

Embed This Tool on Your Website

Want to provide a free Http Header Checker to your visitors? Copy and paste the HTML code below into your website or blog. It's 100% free!

What are HTTP Headers?

Whenever your browser requests a webpage, the web server responds with the page's HTML content. However, before sending the HTML, it sends a block of hidden metadata called HTTP Response Headers.

These headers provide critical instructions to the browser. They dictate how long the page should be cached, what security policies to enforce, the server software being used, and whether the page has moved permanently (a 301 redirect). Our tool acts as an X-ray machine, allowing you to see this invisible communication.

Why Inspect Headers?

  • SEO Audits: Search engines look at HTTP status codes. Use this tool to verify that your 301 redirects are working correctly and not returning 404 Not Found errors or messy 302 temporary redirects.
  • Security Compliance: Security professionals use header checkers to verify the presence of critical security headers like Strict-Transport-Security (HSTS), Content-Security-Policy, and X-Frame-Options.
  • Performance Debugging: Verify that your server is sending the correct Cache-Control or Content-Encoding: gzip headers to speed up page loads.

How to Use the Tool

  1. Enter the full URL of the webpage or API endpoint you want to test (e.g., https://example.com/page).
  2. Click "Check Headers".
  3. Our server will make a lightweight `HEAD` request to the target URL.
  4. Read the resulting HTTP Status Code and the list of key-value header pairs outputted below.

Frequently Asked Questions (FAQ)

What does HTTP Status 200 mean?

Status code 200 OK is the standard response for a successful HTTP request. It means the server successfully found the requested page and delivered it without any redirects or errors.

Why am I seeing multiple status codes?

If you request a URL that redirects somewhere else, our tool follows that redirect. You will see the initial redirect code (like 301 Moved Permanently) followed by the headers of the final destination page (usually ending in a 200 OK).

What does the Server header mean?

The Server: header (e.g., Server: nginx or Server: Apache) tells you what web server software the target domain is running. Some security experts recommend hiding this header to prevent attackers from targeting known vulnerabilities in specific server versions.

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