This is a small playground that displays a few TLS headers, like JA4 fingerprint, that are generated when your user-agent makes the TLS handshake with CloudFront, the CDN that serves this site.
| Header | Value |
|---|---|
| CloudFront-Viewer-Country | US |
| CloudFront-Viewer-Country-Region | |
| CloudFront-Viewer-City | Columbus |
| CloudFront-Viewer-Latitude | |
| CloudFront-Viewer-Longitude | |
| CloudFront-Viewer-Address | 216.73.216.46:59568 |
| CloudFront-Viewer-ASN | 16509 |
| CloudFront-Viewer-TLS | TLSv1.3:TLS_AES_128_GCM_SHA256:connectionReused |
| CloudFront-Viewer-JA4-Fingerprint | t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 |
| user-agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
| x-amzn-tls-version | TLSv1.2 |