HTTP Headers Checker
View the HTTP response headers a site sends, plus a security-header checklist.
GuideGuide: Reading HTTP Security Headers — What to Check Before You Bill a ClientThe five security headers worth checking on any client site, what each protects against, and how to explain a finding without causing a panic.GuideGuide: How to Quickly Vet a Suspicious Website Before You (or a Client) ClickA bare-bones header setup is a soft signal when vetting a suspicious link — see how it fits with the other checks.