TLS & certificates
TLS 1.3 supported
Certificate validity and trust, key strength and protocol versions.
Why it matters
TLS 1.3 connects faster and removes legacy weaknesses; without it, every visitor uses an older protocol.
How to fix it
Quick fix · under 1 hour- Enable TLS 1.3 (OpenSSL 1.1.1+ is required).
- Reload the web server and re-run the scan to confirm.
nginx
ssl_protocols TLSv1.2 TLSv1.3;
Apache
SSLProtocol -all +TLSv1.2 +TLSv1.3
Test this now, free: SSL certificate checker - no sign-up.
How we test it
The check runs from the public internet as part of every scan, read-only and without touching your data. If it fails, your report shows the evidence that proves it - the record, header, file or banner we observed - together with the fix above, tailored to the issue we found.
Does your domain pass this check?
Run all 97 checks in about a minute. Your first scan is free, with the complete fix for your most urgent finding.
Scan your domain free