How to Use the SSL/TLS Deep Inspector (A–F Grading)

The SSL/TLS Deep Inspector connects to your hostname on port 443 (or a custom port), completes a handshake from the DevTools backend, and returns an A–F grade with actionable findings.

When to use it

• After renewing a certificate — confirm chain and expiry
• Before launch — compare staging vs production grades
• During incidents — distinguish expiry vs missing intermediate vs hostname mismatch

Steps

1. Open /ssl-inspector
2. Enter a public hostname (e.g. github.com) and port 443
3. Click Inspect TLS
4. Fix critical findings first — expired certs always grade F

vs SSL Certificate Checker

The legacy SSL Certificate Checker focuses on certificate fields. The Deep Inspector adds grading, protocol/cipher negotiation, and security-oriented findings. Use both if you need PEM chain parsing via SSL Chain Analyzer.

Authorization

Only inspect hosts you own or have permission to test.