3W1 SEO Tools

Make your WWW the #1 with SEO!

  1. SEO Analysis
  2. Predicted PageRank
  3. PageRank Button
  4. Check PageRank
  5. WHOIS
  6. HTTP Headers 

3W1 strongly recommends „White Hat SEO” – learn why it's good for your website, while „Black Hat SEO” is not.

12 HTTP Headers from www.shanghaicaidi.comWith a configurable User Agent String, referring URL (referer) and cookies


  1. HTTP/1.1 200 OK
  2. Date: Mon, 21 Apr 2025 13:23:48 GMT
  3. Content-Type: text/html
  4. Connection: keep-alive
  5. Last-Modified: Tue, 01 Oct 2024 00:12:34 GMT
  6. cf-cache-status: DYNAMIC
  7. Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=sr2OFCGcHZ0cfrbZA2W9Zt%2FVxT8BcAA8yp0oAQeCABNnISUnlvpuE2rKYnVNWP2FbhMCI1N0JtguFam26hxTKv9sV6DESkaogTxmIj0j4xK1r9OGZGTdpO2cj9%2F7H7p9lbqdASWociHTwOZe%2Bw9UBGeBHjw%3D"}],"group":"cf-nel","max_age":604800}
  8. NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
  9. Server: cloudflare
  10. CF-RAY: 933d32b47ed75d8e-FRA
  11. alt-svc: h3=":443"; ma=86400
  12. server-timing: cfL4;desc="?proto=TCP&rtt=1479&min_rtt=1479&rtt_var=739&sent=1&recv=3&lost=0&retrans=0&sent_bytes=0&recv_bytes=168&delivery_rate=0&cwnd=249&unsent_bytes=0&cid=0000000000000000&ts=0&x=0"

Latest HTTP Headers requests list 30 URLs with HTTP status codes


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