Check your certificate, TLS setup, and security headers in seconds — free and no signup
SSL is just one piece of site health — run a complete audit to check speed, mobile-friendliness, meta tags, and broken links too.
Run Free Website AuditAn expired, misconfigured, or self-signed certificate is one of the fastest ways to lose a visitor's trust — browsers throw up a full-page warning before anyone even sees your site. This tool connects directly to your domain over TLS, reads the certificate that's actually being served, and checks its validity window, chain, hostname match, and signature strength. It also verifies that plain HTTP traffic is redirected to HTTPS, tests whether outdated TLS versions are still being accepted, and scans for the response headers (like HSTS and Content-Security-Policy) that harden a site against common attacks. Run it after renewing a certificate, changing hosts, or updating your server config to confirm everything is set up the way you expect.