What are HTTP response headers?

HTTP headers carry information between a browser or crawler and a web server. Headers can control caching, content type, redirects, security and crawler directives.

How to check HTTP headers

Paste the raw response headers from your browser, server log, curl output or another testing tool. This version analyzes the text locally and does not make a cross-origin request.

SEO headers to review

Pay attention to status, location, content type, cache directives and X-Robots-Tag when diagnosing technical SEO issues.