HTTP Headers Checker

Every time your browser asks a server for a page, the server sends back metadata before the actual content. That metadata is HTTP headers. Headers describe the response status, content type, caching policy, security rules, redirect targets, and dozens of other small but important details.

SEOs check headers to confirm the right status code is returned, that pages are not accidentally noindex, that redirects use 301 not 302, and that compression and caching are configured. Developers debug API responses, security teams check for missing security headers like Strict Transport Security and X Frame Options.

1. Paste the URL you want to inspect.
2. Click Get headers.
3. Read the status line first, then scan key headers like Cache Control, X Robots Tag, Content Type, and any security headers.

Watch for any X Robots Tag with noindex on a page you want indexed. Watch for missing Content Security Policy on apps that handle user input. Watch for Cache Control values that are too aggressive or too loose for the content type.