HTTP headers and status code checker
See exactly what a server sends back: the HTTP status code, every response header, the redirect chain and the response time from Cloudflare's network. Security headers such as HSTS, Content-Security-Policy and X-Frame-Options are graded with copy-ready fixes.
How to use the HTTP Headers & Status Checker
- 1Enter the URL you want to inspect.
- 2Read the status code, redirect count, response time and security score at the top.
- 3Open Headers for the full list, Security for graded security headers and cookies, or Redirects for each hop.
- 4Copy the headers to share them with your developer or hosting support.
Frequently asked questions
What does each HTTP status code group mean?
2xx means success (200 OK), 3xx a redirect (301, 302), 4xx a problem with the request such as a missing page (404) or forbidden (403), and 5xx a server error (500, 502, 503).
Why does the checker show a different status than my browser?
Some servers answer bots differently, block data centre networks (403 or 429), or show a cookie wall. Your browser may also show a cached copy. Check from a private window to compare.
Can I see the request headers that were sent?
The checker sends a standard GET with a JoinPostlyBot user agent, Accept and Accept-Language headers. It shows the response headers the server returned, which is what matters for caching, security and SEO.
Related free tools
All tools- Security headers checkerSecurity headers checker
- HTTP status code checkerHTTP status code checker
- Redirect Chain CheckerFollow every hop of a redirect, see 301s and 302s, and spot loops.
- Is It Down CheckerIs a website down for everyone or just you? Checked from Cloudflare.
- SSL Certificate CheckerIs HTTPS set up right? Certificate accepted, redirects, HSTS and CAA.
- Website SEO ScoreA free mini audit of one page with the Site Audit's checks and fixes.
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