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 | |
| CloudFront-Viewer-Country-Region | |
| CloudFront-Viewer-City | |
| CloudFront-Viewer-Latitude | |
| CloudFront-Viewer-Longitude | |
| CloudFront-Viewer-Address | |
| CloudFront-Viewer-ASN | |
| CloudFront-Viewer-TLS | |
| CloudFront-Viewer-JA4-Fingerprint | |
| user-agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
| x-amzn-tls-version | TLSv1.3 |